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SUPPLEMENTAL UNAUDITED QUARTERLY FINANCIAL INFORMATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Quarterly Financial Data [Abstract]                      
Sales $ 11,348 $ 9,347 $ 9,799 $ 8,389 $ 9,494 $ 10,063 $ 9,295 $ 7,775 $ 38,883 $ 36,627 $ 29,520
Gross profit 5,899 4,594 5,042 4,226 4,830 5,062 4,700 3,323 19,761 17,915 12,557
Net loss attributable to common shareholders $ (824) [1] $ (1,245) $ (1,308) $ (1,685) $ (523) $ (964) $ (519) $ (1,944) $ (5,062) $ (3,950) $ 8,364
Basic (loss) income per common share $ (0.03) $ (0.04) $ (0.04) $ (0.05) $ (0.02) $ (0.04) $ (0.02) $ (0.07) $ (0.16) $ (0.14) $ 0.34
Severance and related expense $ 1,524               $ 1,524 $ 0 $ 0
[1] *Fourth quarter 2017 period includes approximately $1.5 million of non-recurring severance and expenses related to former members of the Company’s executive management team and related closure of the corporate office in Purchase, New York.