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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Director
Former Director
Common stock
Common stock
Director
Common stock
Former Director
Additional Paid-in Capital
Additional Paid-in Capital
Director
Additional Paid-in Capital
Former Director
Retained Earnings
Treasury Stock, Common
Beginning balance, shares outstanding at Dec. 31, 2022       14,732,000              
Stockholders' equity, beginning balance at Dec. 31, 2022 $ 137,134     $ 264     $ 238,780     $ 176,843 $ (278,753)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net income $ 17,130                 17,130  
Issuance of common stock from employee stock purchase plan, shares 38,042     38,000              
Issuance of common stock from employee stock purchase plan $ 923           923        
Isuuance of common stock, shares         6,000            
Issuance of common stock 826 $ 177         826 $ 177      
Issuance of restricted common stock, shares       142,000              
Issuance of restricted common stock 0     $ 2     (2)        
Exercise of stock options, shares       5,000              
Exercise of stock options (41)           (41)        
Cancellation and retirement of restricted common stock, shares       (3,000)              
Cancellation and surrender of restricted common stock (78)           (78)        
Stock-based compensation expense 3,160           3,160        
Dividends on common stock (3,340)           (3,340)        
Other, shares       8,000              
Other 276           276        
Ending balance, shares outstanding at Jun. 30, 2023       14,958,000              
Stockholders' equity, ending balance at Jun. 30, 2023 156,167     $ 266     240,681     193,973 (278,753)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock, shares       30,000              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 147,162     $ 266     239,962     185,687 (278,753)
Beginning balance, shares outstanding at Mar. 31, 2023       14,935,000              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net income $ 8,286                    
Issuance of common stock from employee stock purchase plan, shares 16,386                    
Isuuance of common stock, shares       16,000 2,000            
Issuance of common stock $ 397 65         397 65      
Exercise of stock options, shares       4,000              
Exercise of stock options (20)           (20)        
Cancellation and retirement of restricted common stock, shares       1,000              
Cancellation and surrender of restricted common stock (1)           (1)        
Stock-based compensation expense 1,957           1,957        
Dividends on common stock (1,679)           (1,679)        
Ending balance, shares outstanding at Jun. 30, 2023       14,958,000              
Stockholders' equity, ending balance at Jun. 30, 2023 156,167     $ 266     240,681     193,973 (278,753)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 8,286                 8,286  
Beginning balance, shares outstanding at Dec. 31, 2023       15,000,000              
Stockholders' equity, beginning balance at Dec. 31, 2023 173,060     $ 266     241,291     210,256 (278,753)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net income $ 13,232                 13,232  
Issuance of common stock from employee stock purchase plan, shares 31,566     31,000              
Issuance of common stock from employee stock purchase plan $ 671           671        
Isuuance of common stock, shares         10,000 0          
Issuance of common stock   264 $ 0         264 $ 0    
Issuance of restricted common stock, shares       157,000              
Issuance of restricted common stock 0     $ 2     (2)        
Exercise of stock options, shares       50,000              
Exercise of stock options 1,272     $ 1     1,271        
Cancellation and retirement of restricted common stock, shares       (43,000)              
Cancellation and surrender of restricted common stock (419)           (419)        
Stock-based compensation expense 2,407           2,407        
Dividends on common stock (3,390)           (3,390)        
Other, shares       31,000              
Other 790           790        
Ending balance, shares outstanding at Jun. 30, 2024       15,236,000              
Stockholders' equity, ending balance at Jun. 30, 2024 187,887     $ 269     242,883     223,488 (278,753)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 179,555     $ 268     240,811     217,229 (278,753)
Beginning balance, shares outstanding at Mar. 31, 2024       15,165,000              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net income $ 6,259                    
Issuance of common stock from employee stock purchase plan, shares 15,270                    
Isuuance of common stock, shares       15,000 6,000            
Issuance of common stock $ 324 $ 151         324 $ 151      
Exercise of stock options, shares       50,000              
Exercise of stock options 1,272     $ 1     1,271        
Cancellation and surrender of restricted common stock (1)           (1)        
Stock-based compensation expense 2,031           2,031        
Dividends on common stock (1,704)           (1,704)        
Ending balance, shares outstanding at Jun. 30, 2024       15,236,000              
Stockholders' equity, ending balance at Jun. 30, 2024 187,887     $ 269     $ 242,883     223,488 $ (278,753)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 6,259                 $ 6,259