Net Income (Loss) Per Share (Computation of Basic Net Income (Loss) Per Share of Common Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Net Income (Loss) Per Share [Abstract]
Net income (loss)	$ (57,390)	$ (112,210)	$ (947,597)
Weighted average common shares outstanding	310,834,905	304,406,531	123,387,547
Minimum shares issuable under purchase contracts	13,161,695	16,365,258	13,609,077
Total weighted average shares outstanding	323,996,600	320,771,789	136,996,624
Basic net income (loss) per share	$ (0.18)	$ (0.35)	$ (6.92)
Diluted net income (loss) per share:
Net income (loss)	$ (57,390)	$ (112,210)	$ (947,597)
Number of shares used in basic computation	323,996,600	320,771,789	136,996,624
Weighted average effect of dilutive securities
Total weighted average shares outstanding	323,996,600	320,771,789	136,996,624
Diluted net income (loss) per share	$ (0.18)	$ (0.35)	$ (6.92)