Summary of Significant Accounting Policies (Tables)
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12 Months Ended |
Dec. 31, 2015 |
Accounting Policies [Abstract] |
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Summary of Fair Value Assets Measured on Recurring Basis for Cash, Cash Equivalents and Short-term Investments |
The following table summarizes fair value measurements by level for the assets measured at fair value on a recurring basis for cash, cash equivalents and short-term investments:
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As of December 31, 2015
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Gross
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Cash
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Short-
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Adjusted
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unrealized
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and cash
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term
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(amounts in thousands)
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cost
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losses
|
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Fair value
|
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equivalents
|
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investments
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Cash
|
|
$
|
52,164
|
|
|
$
|
—
|
|
|
$
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52,164
|
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|
$
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52,164
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|
$
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—
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Level 1:
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Money market accounts
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6,725
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|
—
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6,725
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|
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6,725
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|
|
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—
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|
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Level 2:
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Certificates of deposit
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24,047
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(37
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)
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24,010
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7,217
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16,793
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Total
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$
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82,936
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|
$
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(37
|
)
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$
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82,899
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$
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66,106
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$
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16,793
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As of December 31, 2014
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Gross
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Cash
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Short-
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|
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Adjusted
|
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unrealized
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and cash
|
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|
term
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(amounts in thousands)
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cost
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losses
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Fair value
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equivalents
|
|
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investments
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Cash
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$
|
2,941
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|
|
$
|
—
|
|
|
$
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2,941
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$
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2,941
|
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|
$
|
—
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Level 1:
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Money market accounts
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42,262
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|
|
—
|
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42,262
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42,262
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|
|
|
—
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Level 2:
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Certificates of deposit
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11,633
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|
|
—
|
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11,633
|
|
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|
11,633
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—
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Total
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$
|
56,836
|
|
|
$
|
—
|
|
|
$
|
56,836
|
|
|
$
|
56,836
|
|
|
$
|
—
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|
Summary of Fair Value Measurements using Significant Level 3 Inputs |
The following table summarizes the fair value measurements using significant Level 3 inputs, and changes therein, for the years ended December 31, 2015 and 2014:
(amounts in thousands)
|
Warrant
liability
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|
Balance as of December 31, 2013
|
$
|
260
|
|
Fair value of preferred stock warrants exercised
|
|
(148
|
)
|
Change in fair value
|
|
(36
|
)
|
Reclassification of liability to additional paid-in capital
|
|
(76
|
)
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Balance as of December 31, 2014
|
|
—
|
|
Balance as of December 31, 2015
|
$
|
—
|
|
|
Summary of Components of Accumulated Other Comprehensive Income (Loss), Net of Tax |
The components of accumulated other comprehensive income (loss), net of tax, were as follows:
|
Unrealized
|
|
|
|
|
|
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Accumulated
|
|
|
losses on
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|
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Unrealized
|
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other
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available-for-
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losses on cash
|
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comprehensive
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(amounts in thousands)
|
sale investments
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|
flow hedges
|
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|
loss
|
|
Balance as of December 31, 2014
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
—
|
|
Other comprehensive loss
|
|
(23
|
)
|
|
|
(14
|
)
|
|
|
(37
|
)
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Balance as of December 31, 2015
|
$
|
(23
|
)
|
|
$
|
(14
|
)
|
|
$
|
(37
|
)
|
|
Summary of Cash, Cash Equivalents and Short-term Investments |
Cash, cash equivalents, and short-term investments consist of the following:
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|
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(amounts in thousands)
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|
December 31,
|
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Cash and cash equivalents
|
|
2015
|
|
|
2014
|
|
Cash
|
|
$
|
52,164
|
|
|
$
|
2,941
|
|
Money market accounts
|
|
|
6,725
|
|
|
|
42,262
|
|
Certificates of deposit
|
|
|
7,217
|
|
|
|
11,633
|
|
Total cash and cash equivalents
|
|
$
|
66,106
|
|
|
$
|
56,836
|
|
Short-term investments
|
|
|
|
|
|
|
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Certificates of deposit
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|
$
|
16,793
|
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|
$
|
—
|
|
Total short-term investments
|
|
$
|
16,793
|
|
|
$
|
—
|
|
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Breakdown of Company's Revenue from U.S. and Non-U.S. Sources |
A portion of revenue is earned from sales outside the United States. Approximately 53.6% of the non-U.S. revenue for 2015 was invoiced in Euros. The Company did not begin to invoice in Euros until the first quarter of 2015. A breakdown of the Company’s revenue from U.S. and non-U.S. sources for the years ended December 31, 2015, 2014 and 2013, respectively, is as follows:
|
Years ended December 31,
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|
(amounts in thousands)
|
2015
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|
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2014
|
|
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2013
|
|
U.S. revenue
|
$
|
123,660
|
|
|
$
|
88,094
|
|
|
$
|
58,677
|
|
Non-U.S. revenue
|
|
35,345
|
|
|
|
24,443
|
|
|
|
16,766
|
|
Total revenue
|
$
|
159,005
|
|
|
$
|
112,537
|
|
|
$
|
75,443
|
|
|
Schedule of Inventories |
Inventories consist of the following:
|
December 31,
|
|
(amounts in thousands)
|
2015
|
|
|
2014
|
|
Raw materials and work-in-progress
|
$
|
7,097
|
|
|
$
|
6,774
|
|
Finished goods
|
|
1,679
|
|
|
|
983
|
|
Less: reserves
|
|
(128
|
)
|
|
|
(141
|
)
|
Inventories
|
$
|
8,648
|
|
|
$
|
7,616
|
|
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Computation of Depreciation and Amortization using Straight Line Method Over Estimated Useful Lives of Assets |
Property and equipment are stated at cost. Depreciation and amortization are calculated using the straight-line method over the assets’ estimated useful lives as follows:
Rental equipment
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|
1.5-5 years
|
Manufacturing equipment and tooling
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2-5 years
|
Computer equipment and software
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|
2-3 years
|
Furniture and equipment
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3-5 years
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Leasehold improvements
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Shorter of 3-10 years or remaining life of underlying lease
|
|
Summary of Depreciation and Amortization Expense of Property and Equipment and Rental Equipment |
Depreciation and amortization expense related to property and equipment and rental equipment is summarized below for the years ended December 31, 2015, 2014 and 2013, respectively.
|
Years ended December 31,
|
|
(amounts in thousands)
|
2015
|
|
|
2014
|
|
|
2013
|
|
Rental equipment
|
$
|
11,965
|
|
|
$
|
10,339
|
|
|
$
|
7,132
|
|
Other property and equipment
|
|
1,961
|
|
|
|
1,591
|
|
|
|
1,209
|
|
Total depreciation and amortization
|
$
|
13,926
|
|
|
$
|
11,930
|
|
|
$
|
8,341
|
|
|
Summary of Property Plant and Equipment and Rental Equipment with Associated Accumulated Depreciation |
Property and equipment and rental equipment with associated accumulated depreciation is summarized below for the years ended December 31, 2015 and 2014, respectively.
(amounts in thousands)
|
Years ended December 31,
|
|
Property and equipment
|
2015
|
|
|
2014
|
|
Rental equipment, net of allowance
|
$
|
54,677
|
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|
$
|
48,359
|
|
Other property and equipment
|
|
11,596
|
|
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|
9,408
|
|
Property and equipment
|
|
66,273
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|
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|
57,767
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|
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Accumulated depreciation
|
|
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Rental equipment
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|
28,894
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|
21,084
|
|
Other property and equipment
|
|
6,699
|
|
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|
4,756
|
|
Accumulated depreciation
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|
35,593
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|
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|
25,840
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|
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Net property and equipment
|
|
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|
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|
Rental equipment
|
|
25,783
|
|
|
|
27,275
|
|
Other property and equipment
|
|
4,897
|
|
|
|
4,652
|
|
Property and equipment, net
|
$
|
30,680
|
|
|
$
|
31,927
|
|
|
Computation of Earnings Per Share |
The computation of EPS is as follows:
|
Years ended December 31,
|
|
(amounts in thousands, except share and per share amounts)
|
2015
|
|
|
2014
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2013
|
|
Numerator—basic:
|
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|
|
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Net income
|
$
|
11,585
|
|
|
$
|
6,826
|
|
|
$
|
25,435
|
|
Less deemed dividend on redeemable convertible preferred stock
|
|
—
|
|
|
|
(987
|
)
|
|
|
(7,278
|
)
|
Net income before preferred rights dividend
|
|
11,585
|
|
|
|
5,839
|
|
|
|
18,157
|
|
Less preferred rights dividend
|
|
—
|
|
|
|
—
|
|
|
|
(7,165
|
)
|
Less undistributed earnings to preferred stock - basic
|
|
—
|
|
|
|
(567
|
)
|
|
|
(10,781
|
)
|
Net income attributable to common stockholders - basic
|
$
|
11,585
|
|
|
$
|
5,272
|
|
|
$
|
211
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Numerator—diluted:
|
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|
|
|
|
|
|
|
|
|
|
Net income
|
$
|
11,585
|
|
|
$
|
6,826
|
|
|
$
|
25,435
|
|
Less deemed dividend on redeemable convertible preferred stock
|
|
—
|
|
|
|
(987
|
)
|
|
|
(7,278
|
)
|
Net income before preferred rights dividend
|
|
11,585
|
|
|
|
5,839
|
|
|
|
18,157
|
|
Less preferred rights dividend
|
|
—
|
|
|
|
—
|
|
|
|
(7,165
|
)
|
Less undistributed earnings to preferred stock - diluted
|
|
—
|
|
|
|
(514
|
)
|
|
|
(9,625
|
)
|
Net income attributable to common stockholders - diluted
|
$
|
11,585
|
|
|
$
|
5,325
|
|
|
$
|
1,367
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Denominator:
|
|
|
|
|
|
|
|
|
|
|
|
Weighted-average common shares - basic common stock
|
|
19,398,991
|
|
|
|
16,182,569
|
|
|
|
276,535
|
|
Weighted-average common shares - diluted common stock
|
|
20,708,170
|
|
|
|
18,037,498
|
|
|
|
2,008,156
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Net income per share - basic common stock
|
$
|
0.60
|
|
|
$
|
0.33
|
|
|
$
|
0.76
|
|
Net income per share - diluted common stock
|
$
|
0.56
|
|
|
$
|
0.30
|
|
|
$
|
0.68
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Denominator calculation from basic to diluted:
|
|
|
|
|
|
|
|
|
|
|
|
Weighted-average common shares - basic common stock
|
|
19,398,991
|
|
|
|
16,182,569
|
|
|
|
276,535
|
|
Warrants
|
|
10,579
|
|
|
|
128,016
|
|
|
|
219,766
|
|
Stock options
|
|
1,298,600
|
|
|
|
1,726,913
|
|
|
|
1,511,855
|
|
Weighted-average common shares - diluted common stock
|
|
20,708,170
|
|
|
|
18,037,498
|
|
|
|
2,008,156
|
|
Shares excluded from diluted weighted-average shares:
|
|
|
|
|
|
|
|
|
|
|
|
Stock options
|
|
744,301
|
|
|
|
546,142
|
|
|
|
—
|
|
Shares excluded from diluted weighted-average shares:
|
|
744,301
|
|
|
|
546,142
|
|
|
|
—
|
|
|