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CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Income Statement [Abstract]        
Product sales, net $ 4,138 $ 5,128 $ 8,585 $ 9,972
Cost of goods sold 2,868 2,838 6,159 5,324
Gross profit 1,270 2,290 2,426 4,648
Operating expenses:        
Research and development 102 225 223 411
Selling, general and administrative 3,483 5,575 6,033 10,860
 Total operating expenses 3,585 5,800 6,256 11,271
Operating loss (2,315) (3,510) (3,830) (6,623)
Interest expense 336 9 1,038 23
Loss before income taxes (2,651) (3,519) (4,868) (6,646)
Income tax expense 2 11 2 11
Net loss (2,653) (3,530) (4,870) (6,657)
Deemed dividend for beneficial conversion of Series A convertible preferred stock 920 0 920 0
Net loss attributable to common stockholders (3,573) (3,530) (5,790) (6,657)
Net loss attributable to common stockholders $ (3,573) $ (3,530) $ (5,790) $ (6,657)
Weighted average common shares outstanding, basic (in shares) 135,414 107,623 127,104 106,074
Weighted average common shares outstanding, diluted (in shares) 135,414 107,623 127,104 106,074
Net loss per share attributable to common stockholders, basic (in USD per share) $ (0.03) $ (0.03) $ (0.05) $ (0.06)
Net loss per share attributable to common stockholders, diluted (in USD per share) $ (0.03) $ (0.03) $ (0.05) $ (0.06)
Revenue, product and service [Extensible List] Product [Member] Product [Member] Product [Member] Product [Member]

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