Loss per Share - Amounts Used in Computing (Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net loss	$ (21,001)	$ (34,067)	$ (13,164)
Series A convertible preferred stock issuance costs	(1,031)
Series A convertible preferred stock dividends	(1,576)
Net loss attributable to common shareholders	$ (23,608)	$ (34,067)	$ (13,164)
Denominator:
Weighted average shares outstanding - basic and diluted	23,458	23,233	23,037
Net loss per share - basic and diluted:	$ (1.01)	$ (1.47)	$ (0.57)
Anti-dilutive stock options, SSARs, restricted shares, performance shares and preferred shares	4,228	1,510	1,433