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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Director
Common Stock [Member]
Common Stock [Member]
Director
Additional Paid-in Capital
Additional Paid-in Capital
Director
Accumulated Deficit
Treasury Stock
Beginning balance, shares outstanding at Dec. 31, 2018     18,078,000          
Beginning Balance at Dec. 31, 2018 $ 221,492   $ 257   $ 243,849   $ 71,680 $ (94,294)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net Income (Loss) $ 14,533           14,533  
Issuance of common stock from employee stock purchase plan (in shares) 73,731              
Issuance of common stock, shares     74,000 7,000        
Issuance of common stock $ 972 $ 155 $ 1   971 $ 155    
Exercise of stock options, shares 247,000   76,000          
Exercise of stock options $ 472   $ 1   471      
Issuance of restricted common stock, shares     26,000          
Cancellation and retirement of restricted common stock, shares     (21,000)          
Cancellation and retirement of restricted common stock (194)       (194)      
Stock-based compensation expense 1,998       1,998      
Dividends on common stock $ (5,398)       (5,398)      
Treasury stock acquired, shares (400,000)   (400,000)          
Treasury stock acquired $ (7,756)             (7,756)
Other (in share)     15,000          
Other 295       295      
Ending balance, shares outstanding at Dec. 31, 2019     17,855,000          
Ending Balance at Dec. 31, 2019 226,569   $ 259   242,147   86,213 (102,050)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net Income (Loss) $ 16,090           16,090  
Issuance of common stock from employee stock purchase plan (in shares) 71,908              
Issuance of common stock, shares     72,000 31,000        
Issuance of common stock $ 1,202 653 $ 1   1,201 653    
Exercise of stock options, shares 40,365   20,000          
Exercise of stock options $ (70)       (70)      
Issuance of restricted common stock, shares     10,000          
Cancellation and retirement of restricted common stock, shares     (11,000)          
Cancellation and retirement of restricted common stock (250)       (250)      
Stock-based compensation expense 2,717       2,717      
Dividends on common stock (6,048)       (6,048)      
Stock Issued During Period, Value, Conversion of Convertible Securities $ (828)       (828)      
Treasury stock acquired, shares 0              
Other (in share)     18,000          
Other $ 467       467      
Ending balance, shares outstanding at Dec. 31, 2020     17,995,000          
Ending Balance at Dec. 31, 2020 240,502   $ 260   239,989   102,303 (102,050)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net Income (Loss) $ 33,159           33,159  
Issuance of common stock from employee stock purchase plan (in shares) 61,904   62,000          
Issuance of common stock from employee stock purchase plan $ 1,630   $ 1   1,629      
Issuance of common stock, shares       15,000        
Issuance of common stock   $ 642       $ 642    
Exercise of stock options, shares 423,294   169,000          
Exercise of stock options $ (1,257)   $ 2   (1,259)      
Issuance of restricted common stock, shares     9,000          
Issuance of restricted common stock 0              
Cancellation and retirement of restricted common stock, shares     (11,000)          
Cancellation and retirement of restricted common stock (375)       (375)      
Stock-based compensation expense 4,871       4,871      
Dividends on common stock (7,264)       (7,264)      
Convertible notes conversions $ (1,424)       (1,424)      
Treasury stock acquired, shares (2,906,983)   (2,907,000)          
Treasury stock acquired $ (142,469)             (142,469)
Ending balance, shares outstanding at Dec. 31, 2021     15,332,000          
Ending Balance at Dec. 31, 2021 $ 128,015   $ 263   $ 236,809   $ 135,462 $ (244,519)