Employee Benefit and Stock Compensation Plans Employee Benefit and Stock Compensation Plans-Restricted Stock, Activity (Details) - $ / shares	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares	3,400	3,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	1,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares	(1,050)	(800)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	400	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares	1,950	3,400
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price	$ 4.52	$ 5.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	0.00	3.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value	5.06	5.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value	5.56	0.00
Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price	$ 4.76	$ 4.52