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NET (LOSS) INCOME PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Net Loss per Share                
Net loss $ (7,865) $ (9,017) $ (5,228) $ (7,840) $ 1,500 $ 993 $ (22,110) $ (5,347)
Weighted average common shares outstanding:                
Basic 23,632,112     23,423,437     23,545,693 23,350,204
Diluted 23,632,112     23,423,437     23,545,693 23,350,204
Basic loss per share of common stock $ (0.33)     $ (0.33)     $ (0.94) $ (0.23)
Diluted loss per share of common stock $ (0.33)     $ (0.33)     $ (0.94) $ (0.23)