16. QUARTERLY FINANCIAL DATA (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statement of Operations Data:
Net revenues	$ 8,535	$ 10,049	$ 11,740	$ 13,019	$ 12,686	$ 14,702	$ 12,832	$ 11,266	$ 43,343	$ 51,486	$ 42,643
Gross profit	4,483	6,049	6,568	8,243	7,770	10,039	8,031	5,788	25,343	31,628	22,426
Net income (loss)	$ (3,824)	$ (4,620)	$ (1,768)	$ (125)	$ (102)	$ 2,262	$ (351)	$ (1,646)	$ (10,337)	$ 163	$ (4,515)
Net income (loss) per common share - Basic	$ (0.16)	$ (0.20)	$ (0.08)	$ (0.01)		$ 0.10	$ (0.02)	$ (0.08)	$ (0.45)	$ 0.01	$ (0.21)
Net income (loss) per common share - Diluted	$ (0.16)	$ (0.20)	$ (0.08)	$ (0.01)		$ 0.10	$ (0.02)	$ (0.08)	$ (0.45)	$ 0.01	$ (0.21)