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Consolidated Statements of Stockholder's Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Treasury Stock [Member]
Balance at Dec. 31, 2018 $ 27,323 $ 49 $ 41,023 $ (13,169) $ (580)
Balance (in shares) at Dec. 31, 2018   4,831,178      
Net income 7,016     7,016  
Exercise of stock options 442 $ 1 441    
Exercise of stock options (in shares)   96,748      
Repurchase of shares exercised, (in shares)   (734)      
Stock-based compensation 112   112    
Stock-based compensation (in shares)   5,871      
Balance at Dec. 31, 2019 $ 34,893 $ 50 41,576 (6,153) (580)
Balance (in shares) at Dec. 31, 2019 4,933,063 4,933,063      
Net income $ 968     968  
Exercise of stock options $ 85   85    
Exercise of stock options (in shares) 20,329 20,329      
Repurchase of shares exercised $ (23)   (23)    
Repurchase of shares exercised, (in shares)   (2,295)      
Stock-based compensation 790   790    
Stock-based compensation (in shares)   57,382      
At-the market stock sales 3,254 $ 3 3,251    
At-the-market stock sales, (in shares)   263,725      
Share-related issuance costs (202)   (202)    
Balance at Dec. 31, 2020 $ 39,765 $ 53 $ 45,477 $ (5,185) $ (580)
Balance (in shares) at Dec. 31, 2020 5,272,204 5,272,204