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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited)        
Revenue, net $ 3,075 $ 1,851 $ 10,402 $ 5,882
Cost of revenue 1,616 979 5,295 2,817
Gross profit 1,459 872 5,107 3,065
Operating expenses:        
Engineering, research and development 588 319 1,765 912
Selling, general and administrative 963 743 3,201 2,476
Total operating expenses 1,551 1,062 4,966 3,388
Income (loss) from operations (92) (190) 141 (323)
Other income (expense):        
Other income (expense), net 26 207 154 704
Income before income taxes (66) 17 295 381
Income tax expense 59 11 230 121
Net income (loss) (125) 6 65 260
Net income (loss) applicable to common stockholders $ (225) $ (94) $ (235) $ (40)
Earnings (loss) per common share, basic $ (0.03) $ (0.01) $ (0.04) $ (0.01)
Earnings (loss) per common share, diluted $ (0.03) $ (0.01) $ (0.04) $ (0.01)
Weighted average common shares outstanding - basic 6,582 6,603 6,597 6,603
Weighted average common shares outstanding - diluted 6,582 6,603 6,597 6,603