NET INCOME (LOSS) PER SHARE - Schedule of Calculations of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss)	$ 7,896	$ (3,686)	$ (3,445)	$ (21,106)
Denominator:
Denominator for basic net income (loss) per share - weighted average common shares outstanding (in shares)	74,382	73,058	74,122	72,682
Dilutive common equivalent shares:
Weighted average restricted stock units and performance based restricted stock units (in shares)	711	0	0	0
Denominator for diluted net income (loss) per share - weighted average shares outstanding (in shares)	75,093	73,058	74,122	72,682
Net income (loss) per share:
Basic net income (loss) per share (in dollars per share)	$ 0.11	$ (0.05)	$ (0.05)	$ (0.29)
Diluted net income (loss) per share (in dollars per share)	$ 0.11	$ (0.05)	$ (0.05)	$ (0.29)