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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2015 45,224,881        
Balance at Dec. 31, 2015 $ 5 $ 48,073 $ 65,843 $ 113,921
Stock-based compensation (in shares) 199,044        
Stock-based compensation 5,411 5,411
Issuance of stock for equity compensation plans, net (in shares) 280,347        
Issuance of stock for equity compensation plans, net (2,694) (2,694)
Repurchase of shares and warrants (in shares) (308,718)        
Repurchase of shares and warrants (10,343) (10,343)
Acquisition of Natural Habitat Inc. (in shares) 264,208        
Acquisition of Natural Habitat Inc. 2,650 2,650
Net income (loss) 4,864 4,864
Other comprehensive income, net        
Balance (in shares) at Dec. 31, 2016 45,659,762        
Balance at Dec. 31, 2016 $ 5 43,097 70,707 113,809
Balance (in shares) at Dec. 31, 2015 45,224,881        
Balance at Dec. 31, 2015 $ 5 48,073 65,843 113,921
Balance (in shares) at Dec. 31, 2018 45,814,925        
Balance at Dec. 31, 2018 $ 5 41,539 75,171 (671) 116,044
Balance (in shares) at Dec. 31, 2016 45,659,762        
Balance at Dec. 31, 2016 $ 5 43,097 70,707 113,809
Stock-based compensation (in shares)        
Stock-based compensation 10,627 10,627
Issuance of stock for equity compensation plans, net (in shares) 314,326        
Issuance of stock for equity compensation plans, net (5,034) (5,034)
Repurchase of shares and warrants (in shares) (547,058)        
Repurchase of shares and warrants (6,192) (6,192)
Net income (loss) (8,661) (8,661)
Cumulative effect of change in accounting principle 1,773 1,773
Other comprehensive income, net        
Balance (in shares) at Dec. 31, 2017 45,427,030        
Balance at Dec. 31, 2017 $ 5 42,498 63,819 106,322
Stock-based compensation (in shares)        
Stock-based compensation 4,405 4,405
Issuance of stock for equity compensation plans, net (in shares) 396,925        
Issuance of stock for equity compensation plans, net (4,510) (4,510)
Repurchase of shares and warrants (in shares) (9,030)        
Repurchase of shares and warrants (854) (854)
Net income (loss) 11,352 11,352
Other comprehensive income, net (671) (671)
Balance (in shares) at Dec. 31, 2018 45,814,925        
Balance at Dec. 31, 2018 $ 5 $ 41,539 $ 75,171 $ (671) $ 116,044