Stock-Based Compensation - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for stock-based compensation plans	$ 1,231	$ 1,544	$ 1,189
Unrecognized stock-based compensation expense	501	1,221	1,095
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for stock-based compensation plans	517	563	441
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for stock-based compensation plans	714	981	682
Other
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for stock-based compensation plans	$ 0	$ 0	$ 66