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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Statement [Abstract]        
Net sales $ 2,915 $ 5,158 $ 9,174 $ 14,989
Cost of sales 1,887 3,877 8,157 11,596
Gross profit 1,028 1,281 1,017 3,393
Operating expenses:        
Product development 191 638 1,035 1,940
Selling, general, and administrative 1,689 2,543 5,524 7,611
Restructuring (19) 1 243 (46)
Total operating expenses 1,861 3,182 6,802 9,505
Loss from operations (833) (1,901) (5,785) (6,112)
Other expenses (income):        
Interest expense 67 2 136 4
Other expenses (income) 46 17 144 (2)
Net loss $ (946) $ (1,920) $ (6,065) $ (6,114)
Net loss per share - basic and diluted (in dollars per share) $ (0.08) $ (0.16) $ (0.49) $ (0.51)
Weighted average shares used in computing net loss per share:        
Basic and diluted (in shares) 12,370 12,059 12,278 11,970