Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income (loss)	$ 5,867	$ (2,918)	$ 5,350	$ (4,493)
Series A convertible preferred stock issuance costs	(94)		(1,031)
Series A convertible preferred stock dividends	(459)		(658)
Net income (loss) attributable to common shareholders	$ 5,314	$ (2,918)	$ 3,661	$ (4,493)
Denominator:
Weighted average shares outstanding - basic	23,424	23,238	23,415	23,225
Dilutive SSARs	342		329
Dilutive unvested restricted shares	100		105
Weighted average shares outstanding - diluted	23,866	23,238	23,849	23,225
Net income (loss) per share - basic:	$ 0.23	$ (0.13)	$ 0.16	$ (0.19)
Net income (loss) per share - diluted:	$ 0.22	$ (0.13)	$ 0.15	$ (0.19)
Earnings Per Share, Diluted [Abstract]
Anti-dilutive stock options, SSARs, restricted shares, performance shares and preferred shares	2,415	1,494	2,418	1,386