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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings (Accumulated Deficit)
Accumulated Other Comprehensive Loss
Treasury Stock
Beginning balance (in shares) at Dec. 31, 2019   19,399,000        
Beginning balance at Dec. 31, 2019 $ 149,989 $ 194 $ 144,485 $ 19,538 $ (2,767) $ (11,461)
Beginning balance, treasury stock (in shares) at Dec. 31, 2019           (1,397,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (9,766)     (9,766)    
Other comprehensive income (loss) (2,610) [1]       (2,610)  
Stock-based compensation 1,547   1,547      
Issuance of common stock under employee stock purchase plan (in shares)   20,000        
Issuance of common stock under employee stock purchase plan 156   156      
Acquisition of treasury stock (in shares)           (36,000)
Acquisition of treasury stock (390)         $ (390)
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares)   26,000        
Exercise of stock options and issuance of restricted stock awards, net of forfeitures 62   62      
Ending balance (in shares) at Jun. 30, 2020   19,445,000        
Ending balance at Jun. 30, 2020 138,988 $ 194 146,250 9,772 (5,377) $ (11,851)
Ending balance, treasury stock (in shares) at Jun. 30, 2020           (1,433,000)
Beginning balance (in shares) at Mar. 31, 2020   19,419,000        
Beginning balance at Mar. 31, 2020 141,877 $ 194 145,457 13,324 (5,247) $ (11,851)
Beginning balance, treasury stock (in shares) at Mar. 31, 2020           (1,433,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (3,552)     (3,552)    
Other comprehensive income (loss) (130) [1]       (130)  
Stock-based compensation 742   742      
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares)   26,000        
Exercise of stock options and issuance of restricted stock awards, net of forfeitures 51   51      
Ending balance (in shares) at Jun. 30, 2020   19,445,000        
Ending balance at Jun. 30, 2020 $ 138,988 $ 194 146,250 9,772 (5,377) $ (11,851)
Ending balance, treasury stock (in shares) at Jun. 30, 2020           (1,433,000)
Beginning balance (in shares) at Dec. 31, 2020 18,429,840 19,863,000        
Beginning balance at Dec. 31, 2020 $ 131,884 $ 199 149,170 (2,402) (3,232) $ (11,851)
Beginning balance, treasury stock (in shares) at Dec. 31, 2020 (1,432,694)         (1,433,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss $ (9,701)     (9,701)    
Other comprehensive income (loss) 264 [1]       264  
Stock-based compensation 1,987   1,987      
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares)   382,000        
Exercise of stock options and issuance of restricted stock awards, net of forfeitures $ 2,442 $ 3 2,439      
Ending balance (in shares) at Jun. 30, 2021 18,811,885 20,245,000        
Ending balance at Jun. 30, 2021 $ 126,876 $ 202 153,596 (12,103) (2,968) $ (11,851)
Ending balance, treasury stock (in shares) at Jun. 30, 2021 (1,432,694)         (1,433,000)
Beginning balance (in shares) at Mar. 31, 2021   20,165,000        
Beginning balance at Mar. 31, 2021 $ 130,569 $ 202 151,657 (6,430) (3,009) $ (11,851)
Beginning balance, treasury stock (in shares) at Mar. 31, 2021           (1,433,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (5,673)     (5,673)    
Other comprehensive income (loss) 41 [1]       41  
Stock-based compensation 1,055   1,055      
Exercise of stock options and issuance of restricted stock awards, net of forfeitures (in shares)   80,000        
Exercise of stock options and issuance of restricted stock awards, net of forfeitures $ 884   884      
Ending balance (in shares) at Jun. 30, 2021 18,811,885 20,245,000        
Ending balance at Jun. 30, 2021 $ 126,876 $ 202 $ 153,596 $ (12,103) $ (2,968) $ (11,851)
Ending balance, treasury stock (in shares) at Jun. 30, 2021 (1,432,694)         (1,433,000)
[1] Tax impact was nominal for all periods.