Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Schedule of Changes in Aggregate Product Warranty Liabilities (Details)

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Commitments and Contingencies - Schedule of Changes in Aggregate Product Warranty Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Product Warranty Liability [Line Items]    
Product warranty liability at beginning of period $ 809 $ 447
Accruals for warranties issued 208 88
Adjustments related to preexisting warranties (including changes in estimates) 138 244
Settlements made (in cash or in kind) (234) (85)
Product warranty liability at end of period $ 921 $ 694