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Quarterly results of operations (unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Quarterly results of operations (unaudited) [Abstract]                    
Net sales $ 17,958 $ 17,856 $ 12,623 $ 9,702 $ 11,123 $ 10,637 $ 9,325 $ 8,301 $ 58,139 $ 39,386
Gross profit 8,219 8,193 5,434 2,566 4,306 4,305 3,432 3,339 24,412 15,382
Net (loss) income $ 260 $ 528 $ (2,376) $ (4,348) $ (823) $ 901 $ (2,030) $ (2,089) $ (5,936) $ (4,041)
Net (loss) income per common share [Abstract]                    
Basic (in dollars per share) $ 0.03 $ 0.05 $ (0.24) $ (0.44) $ (0.08) $ 0.1 $ (0.23) $ (0.23) $ (0.6) $ (0.43)
Diluted (in dollars per share) $ 0.03 $ 0.05 $ (0.24) $ (0.44) $ (0.08) $ 0.09 $ (0.23) $ (0.23) $ (0.6) $ (0.43)