Restructuring Charges (Details) - USD ($)	12 Months Ended		24 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 311,000	$ 450,000	$ 450,000
Restructuring Charges		(264,000)
Payments for restructuring, severance and other charges		(403,000)
Ending Balance	0	311,000	0
2016 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	311,000
Restructuring Charges	(243,000)		(500,000)
Payments for restructuring, severance and other charges	(554,000)
Ending Balance	0	311,000	0
2016 Restructuring Plan [Member] | Severance and employment costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	311,000	0	0
Restructuring Charges	(200,000)	(328,000)
Payments for restructuring, severance and other charges	(511,000)	(17,000)
Ending Balance	0	311,000	0
2016 Restructuring Plan [Member] | Early Lease Termination [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Restructuring Charges	(43,000)
Payments for restructuring, severance and other charges	(43,000)
Ending Balance	0	0	0
2016 Restructuring Plan [Member] | Facilities costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance
Ending Balance
2015 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Ending Balance	$ 0		0
2015 Restructuring Plan [Member] | Facilities costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance		450,000	$ 450,000
Restructuring Charges		(64,000)
Payments for restructuring, severance and other charges		$ (386,000)