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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Statement [Abstract]    
Net sales $ 16,828 $ 12,705
Cost of sales 11,643 10,731
Gross profit 5,185 1,974
Operating expenses:    
Product development 1,415 1,284
Selling, general, and administrative 7,900 7,449
Restructuring (60) 196
Total operating expenses 9,255 8,929
Loss from operations (4,070) (6,955)
Other expenses:    
Interest expense 481 317
Loss on extinguishment of debt 276 0
Loss from change in fair value of warrants 1,086 0
Other expenses 73 91
Loss from operations before income taxes (5,986) (7,363)
(Benefit from) provision for income taxes (5) 10
Net loss $ (5,981) $ (7,373)
Denominator:    
Net loss $ (1.83) $ (2.99)
Weighted average shares of common shares outstanding:    
Basic and diluted (in shares) [1] 3,270 2,462
[1]       *Shares outstanding for prior periods have been restated for the 1-for-5 reverse stock split effective June 11, 2020.