QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Selected Quarterly Financial Information [Abstract]
Total revenue	$ 22,058	$ 30,714	$ 36,510	$ 35,101	$ 35,497	$ 44,251	$ 26,281	$ 10,811	$ 124,383	$ 116,840	$ 150,841
Gross profit	5,253	7,641	10,788	10,230	9,220	11,006	7,263	2,635	33,912	30,124	37,123
Net income (loss)	$ (1,180)	$ 1,102	$ 3,659	$ 2,510	$ 22,124	$ 4,315	$ 1,914	$ (2,219)	$ 6,091	$ 26,134	$ 12,462
Basic net income (loss) per share	$ (0.04)	$ 0.04	$ 0.12	$ 0.08	$ 0.72	$ 0.14	$ 0.06	$ (0.07)	$ 0.20	$ 0.85	$ 0.41
Shares used in basic per share calculation	31,097,000	31,085,000	31,031,000	30,860,000	30,782,000	30,736,000	30,669,000	30,352,000	31,018,356	30,634,553	30,104,552
Diluted net income (loss) per share	$ (0.04)	$ 0.04	$ 0.12	$ 0.08	$ 0.71	$ 0.14	$ 0.06	$ (0.07)	$ 0.19	$ 0.83	$ 0.40
Shares used in diluted per share calculation	31,097,000	31,235,000	31,288,000	31,290,000	31,295,000	31,320,000	31,170,000	30,352,000	31,294,573	31,303,727	30,964,777