Savings and Retirement Plans (Details) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Savings and Retirement Plans [Abstract]
Employer discretionary contribution amount to U.S. plan			$ 137,000	$ 113,000
Defined Benefit Plans, Net Periodic Retirement Cost [Abstract]
Gross service cost	36,000	31,000	71,000	62,000
Interest cost	35,000	34,000	73,000	69,000
Expected return on assets	(27,000)	(20,000)	(54,000)	(40,000)
Amortization	1,000	2,000	2,000	3,000
Net periodic retirement cost	$ 45,000	$ 47,000	$ 92,000	$ 94,000