Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Stockholders' Equity (Unaudited)

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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common stock
Additional paid-in capital
Retained earnings (accumulated deficit)
Accumulated other comprehensive income (loss)
Beginning Balance at Dec. 31, 2016 $ 182,088 $ 20 $ 194,466 $ (12,363) $ (35)
Beginning Balance, shares at Dec. 31, 2016   20,389,860      
Stock-based compensation 4,107   4,107    
Employee stock purchases 581   581    
Employee stock purchases, shares   11,805      
Stock options exercised 6,730 $ 1 6,729    
Stock options exercised, shares   308,132      
Net income 14,270     14,270  
Other comprehensive income 1       1
Ending Balance at Jun. 30, 2017 207,777 $ 21 205,883 1,907 (34)
Ending Balance, shares at Jun. 30, 2017   20,709,797      
Beginning Balance at Dec. 31, 2017 227,041 $ 21 218,109 8,639 272
Beginning Balance, shares at Dec. 31, 2017   20,976,350      
Stock-based compensation 6,567   6,567    
Employee stock purchases 988   988    
Employee stock purchases, shares   12,013      
Restricted stock awards issued, shares   53,052      
Vesting of restricted stock units, shares   6,665      
Shares withheld related to net restricted stock settlement (302)   (302)    
Shares withheld related to net restricted stock settlement, shares   (2,553)      
Stock options exercised $ 6,517   6,517    
Stock options exercised, shares 276,016 276,016      
Net income $ 25,368     25,368  
Other comprehensive income 727       727
Ending Balance at Jun. 30, 2018 $ 266,906 $ 21 $ 231,879 $ 34,007 $ 999
Ending Balance, shares at Jun. 30, 2018   21,321,543