Employee Benefit and Stock Compensation Plans Employee Benefit and Stock Compensation Plans-Restricted Stock, Activity (Details) - $ / shares	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
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	3,200	4,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	1,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares	(800)	(800)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	0	0
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, Nonvested, Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price	$ 5.56	$ 5.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	3.48	0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value	5.56	5.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value	0.00	0.00
Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price	$ 4.52	$ 5.56