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16. QUARTERLY FINANCIAL DATA (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Consolidated Statement of Operations Data:
Net revenues	$ 7,686	$ 6,763	$ 6,659	$ 6,621	$ 8,535	$ 10,049	$ 11,740	$ 13,019	$ 27,729	$ 43,343	$ 51,486
Gross profit	3,858	3,197	3,112	3,050	4,483	6,049	6,568	8,243	13,217	25,343	31,628
Net income (loss)	$ (4,982)	$ (5,216)	$ (5,231)	$ (6,076)	$ (3,824)	$ (4,620)	$ (1,768)	$ (125)	$ (21,505)	$ (10,337)	$ 163
Net income (loss) per common share - Basic	$ (0.21)	$ (0.22)	$ (0.22)	$ (0.26)	$ (0.16)	$ (0.20)	$ (0.08)	$ (0.01)	$ (0.91)	$ (0.45)	$ 0.01
Net income (loss) per common share - Diluted	$ (0.21)	$ (0.22)	$ (0.22)	$ (0.26)	$ (0.16)	$ (0.20)	$ (0.08)	$ (0.01)	$ (0.91)	$ (0.45)	$ 0.01

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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