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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement [Abstract]      
Net sales $ 30,998 $ 64,403 $ 22,700
Cost of sales 23,321 35,111 14,922
Gross profit 7,677 29,292 7,778
Operating expenses:      
Product development 3,537 2,810 1,030
Selling, general, and administrative 20,113 16,830 7,839
Loss on impairment 857 0 0
Total operating expenses 24,507 19,640 8,869
(Loss) income from operations (16,830) 9,652 (1,091)
Other expense (income):      
Interest expense 0 85 2,689
Other expenses (income) 18 (53) 466
(Loss) income from continuing operations before income taxes (16,848) 9,620 (4,246)
Provision for income taxes 27 149 0
Net (loss) income from continuing operations (16,875) 9,471 (4,246)
Discontinued operations:      
Loss from discontinued operations 0 (167) (1,571)
Loss on sale of discontinued operations (12) (534) (30)
(Loss) income from discontinued operations before income taxes (12) (701) (1,601)
Provision for (benefit from) income taxes 0 (10) (2)
(Loss) from discontinued operations (12) (691) (1,599)
Net (loss) income $ (16,887) $ 8,780 $ (5,845)
Net (loss) income per share - basic:      
Net income (loss) from continuing operations (in dollars per share) $ (1.45) $ 0.91 $ (0.55)
Net (loss) income from discontinued operations (in dollars per share) 0.00 (0.07) (0.20)
Net income (loss) (in dollars per share) (1.45) 0.84 (0.75)
Net (loss) income per share - diluted:      
Net income (loss) from continuing operations (in dollars per share) (1.45) 0.88 (0.55)
Net (loss) income from discontinued operations (in dollars per share) 0.00 (0.06) (0.20)
Net income (loss) (in dollars per share) $ (1.45) $ 0.82 $ (0.75)
Weighted average common shares outstanding:      
Basic (in shares) 11,673 10,413 7,816
Diluted (in shares) 11,673 10,752 7,816