Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Details)

v3.3.1.900
Stockholders' Equity - Additional Information (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Vote
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Class Of Stock [Line Items]      
Number of voting rights per share of common stock | Vote 1    
Preferred stock, shares authorized 10,000,000    
Preferred stock, shares issued 0    
Preferred stock, shares outstanding 0    
Dividends declared | $ $ 0 $ 0 $ 0
Stock-based compensation expense | $ $ 3,640 $ 1,451  
Rate of reduced stock-based compensation expense for estimated forfeiture 7.50% 6.90%  
Share-based compensation, unrecognized expense, nonvested granted awards | $ $ 12,095 $ 4,948  
Total weighted average fair value of stock options granted | $ $ 2,428 $ 5,329 $ 1,705
Number of warrants 0 15,218 263,463
Fair value of preferred warrant liability | $ $ 0 $ 0  
Change in fair value of preferred stock warrant liability | $ 0 36 $ (262)
Other comprehensive income (loss) foreign currency hedging and available-for-sale investments, net of tax | $ $ (37) $ 0  
Maximum      
Class Of Stock [Line Items]      
Stock option period, expiration 10 years    
Stock option period, vested 4 years    
Minimum      
Class Of Stock [Line Items]      
Stock option period, expiration 7 years    
Stock option period, vested 1 year    
2012 Plan      
Class Of Stock [Line Items]      
Stock option shares outstanding 603,653    
Number of equity awards available for grant 0    
2002 Plan      
Class Of Stock [Line Items]      
Stock option shares outstanding 272,335    
Number of equity awards available for grant 0    
2014 Plan      
Class Of Stock [Line Items]      
Stock option shares outstanding 1,419,382    
Number of equity awards available for grant 410,367 221,178  
Terms of shares available for issuance The number of shares available for issuance under the 2014 Plan also is increased annually on the first day of each fiscal year equal to the least of:• 895,346 shares; • 4% of the outstanding shares of common stock as of the last day of the Company’s immediately preceding fiscal year; or• such other amount as the Company’s board of directors may determine.    
Common stock capital shares reserved for future issuance maximum annual increase 895,346    
Percentage on outstanding shares of common stock 4.00%    
Number of additional number of shares reserve to provision 762,373    
2012 Plan and 2002 Plan | Maximum      
Class Of Stock [Line Items]      
Stock option shares outstanding 2,328,569    
2014 ESPP Plan      
Class Of Stock [Line Items]      
Number of equity awards available for grant 296,674    
Terms of shares available for issuance The number of shares available for sale under the ESPP is increased annually on the first day of each fiscal year equal to the least of: 179,069 shares; 1.5% of the outstanding shares of our common stock on the last day of our immediately preceding fiscal year; or Such other amount as may be determined by the administrator    
Percentage on outstanding shares of common stock 1.50%    
Number of additional number of shares reserve to provision 179,069    
Maximum percentage of common stock eligible to purchase through payroll deductions for participants 15.00%    
Maximum number of shares available for participant to purchase during period 1,500    
Purchase price as percentage of stock price on offering period 85.00%    
Purchase price as percentage of stock price on exercise date 85.00%    
Potential increase of shares available for issuance 179,069    
Stock-based compensation expense | $ $ 360 $ 134  
Redeemable Convertible Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, shares outstanding 0 0  
Common Stock | 2014 Plan      
Class Of Stock [Line Items]      
Number of equity awards available for grant 273,099