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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Preferred Stock
Common Stock
Additional Paid-In Capital
Retained Earnings
Treasury Stock
Balance, beginning of period (in shares) at Dec. 31, 2017   0 12,880,000     0
Balance, beginning of period at Dec. 31, 2017 $ 257,319 $ 0 $ 129 $ 105,325 $ 151,865 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of common stock options, shares (in shares)     9,000      
Exercise of common stock options 157     157    
Compensation expense on common stock options 66     66    
Issuance of restricted stock, shares (in shares)     60,000      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 362     362    
Taxes paid related to net shares settlement of equity awards (495)     (495)    
Net (loss) income 225       225  
Balance, end of period (in shares) at Mar. 31, 2018   0 12,949,000     0
Balance, end of period at Mar. 31, 2018 257,634 $ 0 $ 129 105,415 152,090 $ 0
Balance, beginning of period (in shares) at Dec. 31, 2017   0 12,880,000     0
Balance, beginning of period at Dec. 31, 2017 257,319 $ 0 $ 129 105,325 151,865 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income 708          
Balance, end of period (in shares) at Sep. 30, 2018   0 13,001,000     0
Balance, end of period at Sep. 30, 2018 259,807 $ 0 $ 130 107,104 152,573 $ 0
Balance, beginning of period (in shares) at Mar. 31, 2018   0 12,949,000     0
Balance, beginning of period at Mar. 31, 2018 257,634 $ 0 $ 129 105,415 152,090 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense on common stock options 31     31    
Issuance of restricted stock, shares (in shares)     19,000      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 617   $ 1 616    
Taxes paid related to net shares settlement of equity awards (134)     (134)    
Net (loss) income 247       247  
Balance, end of period (in shares) at Jun. 30, 2018   0 12,968,000     0
Balance, end of period at Jun. 30, 2018 258,395 $ 0 $ 130 105,928 152,337 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of common stock options, shares (in shares)     29,000      
Exercise of common stock options 522     522    
Compensation expense on common stock options 30     30    
Issuance of restricted stock, shares (in shares)     4,000      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 624     624    
Net (loss) income 236       236  
Balance, end of period (in shares) at Sep. 30, 2018   0 13,001,000     0
Balance, end of period at Sep. 30, 2018 259,807 $ 0 $ 130 107,104 152,573 $ 0
Balance, beginning of period (in shares) at Dec. 31, 2018   0 13,005,000     0
Balance, beginning of period at Dec. 31, 2018 260,181 $ 0 $ 130 107,760 152,291 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of common stock options, shares (in shares)     57,000      
Exercise of common stock options 555     555    
Compensation expense on common stock options 31     31    
Issuance of restricted stock, shares (in shares)     71,000      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 464   $ 1 463    
Taxes paid related to net shares settlement of equity awards (192)     (192)    
Net (loss) income 357       357  
Balance, end of period (in shares) at Mar. 31, 2019   0 13,133,000     0
Balance, end of period at Mar. 31, 2019 261,396 $ 0 $ 131 108,617 152,648 $ 0
Balance, beginning of period (in shares) at Dec. 31, 2018   0 13,005,000     0
Balance, beginning of period at Dec. 31, 2018 $ 260,181 $ 0 $ 130 107,760 152,291 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Purchase of treasury shares (in shares) 37,936          
Purchase of treasury shares $ (490)          
Net (loss) income (11,302)          
Balance, end of period (in shares) at Sep. 30, 2019   0 13,142,000     (38,000)
Balance, end of period at Sep. 30, 2019 250,491 $ 0 $ 131 109,861 140,989 $ (490)
Balance, beginning of period (in shares) at Mar. 31, 2019   0 13,133,000     0
Balance, beginning of period at Mar. 31, 2019 261,396 $ 0 $ 131 108,617 152,648 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of common stock options, shares (in shares)     0      
Exercise of common stock options (50)     (50)    
Compensation expense on common stock options 30     30    
Issuance of restricted stock, shares (in shares)     5,000      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 612   $ 0 612    
Taxes paid related to net shares settlement of equity awards 9     9    
Net (loss) income 573       573  
Balance, end of period (in shares) at Jun. 30, 2019   0 13,138,000     0
Balance, end of period at Jun. 30, 2019 262,570 $ 0 $ 131 109,218 153,221 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense on common stock options 32     32    
Issuance of restricted stock, shares (in shares)     4,000      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 611     611    
Purchase of treasury shares (in shares)           (38,000)
Purchase of treasury shares (490)         $ (490)
Net (loss) income (12,232)       (12,232)  
Balance, end of period (in shares) at Sep. 30, 2019   0 13,142,000     (38,000)
Balance, end of period at Sep. 30, 2019 $ 250,491 $ 0 $ 131 $ 109,861 $ 140,989 $ (490)