Restructuring Charges (Details) - USD ($)	12 Months Ended		24 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 243,000
Restructuring Reserve	$ 0	0	$ 0	$ 311,000
Twenty Eighteen Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,600,000
Restructuring Reserve	200,000
2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,639,000		500,000
Restructuring Reserve	198,000	0	0
2016 Restructuring Plan [Member] | Severance and Employment Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,639,000	200,000
Restructuring Reserve	$ 198,000	0	$ 0	311,000
2015 Restructuring Plan [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ (43,000)
Restructuring Reserve				$ 0