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 1,891   1,891    
Employee stock purchases 581   581    
Employee stock purchases, shares   11,805      
Stock options exercised 2,222   2,222    
Stock options exercised, shares   157,412      
Net income 5,932     5,932  
Other comprehensive income 61       61
Ending Balance at Mar. 31, 2017 192,775 $ 20 199,160 (6,431) 26
Ending Balance, shares at Mar. 31, 2017   20,559,077      
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 3,381   3,381    
Employee stock purchases 988   988    
Employee stock purchases, shares   12,013      
Restricted stock awards issued, shares   53,052      
Vesting of restricted stock units, shares   6,206      
Shares withheld related to net restricted stock settlement (302)   (302)    
Shares withheld related to net restricted stock settlement, shares   (2,553)      
Stock options exercised $ 4,459   4,459    
Stock options exercised, shares 169,594 169,594      
Net income $ 10,758     10,758  
Other comprehensive income 12       12
Ending Balance at Mar. 31, 2018 $ 246,337 $ 21 $ 226,635 $ 19,397 $ 284
Ending Balance, shares at Mar. 31, 2018   21,214,662