Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2018   39,880,054 852,482      
Beginning balance at Dec. 31, 2018 $ 51,171 $ 399 $ (1,899) $ 144,739 $ (91,726) $ (342)
Exercise of common stock options (in shares)   39,572        
Exercise of common stock options 60     60    
Stock-based compensation cost 1,661     1,661    
Vesting of restricted stock units (in shares)   155,849 21,516      
Vesting of restricted stock units (30) $ 2 $ (32)      
Net loss (9,021)       (9,021)  
Other comprehensive loss $ (177)         (177)
Ending balance (in shares) at Dec. 31, 2019 39,201,477 40,075,475 873,998      
Ending balance at Dec. 31, 2019 $ 43,664 $ 401 $ (1,931) 146,460 (100,747) (519)
Exercise of common stock options (in shares) 0          
Stock-based compensation cost $ 1,484     1,484    
Vesting of restricted stock units (in shares)   503,048 60,162      
Vesting of restricted stock units (72) $ 5 $ (73) (4)    
Net loss (11,561)       (11,561)  
Other comprehensive loss $ (39)         (39)
Ending balance (in shares) at Dec. 31, 2020 39,644,363 40,578,523 934,160      
Ending balance at Dec. 31, 2020 $ 33,476 $ 406 $ (2,004) $ 147,940 $ (112,308) $ (558)