Restructuring Charges (Restructuring Liability) (Details) - USD ($)	12 Months Ended		24 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 0	$ 311,000
Restructuring Charges		(243,000)
Payments for restructuring, severance and other charges		(554,000)
Ending Balance	0	0	$ 0
2016 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Restructuring Charges	(1,639,000)		(500,000)
Payments for restructuring, severance and other charges	(1,441,000)
Ending Balance	198,000	0	0
2016 Restructuring Plan [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0	311,000
Restructuring Charges	(1,639,000)	(200,000)
Payments for restructuring, severance and other charges	(1,441,000)	(511,000)
Ending Balance	$ 198,000	0	$ 0
2015 Restructuring Plan [Member] | Facilities costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance		0
Restructuring Charges		43,000
Payments for restructuring, severance and other charges		$ (43,000)