Derivative Financial Instruments (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Derivative Financial Instruments (Additional Textual) [Abstract]
Notional amount of open foreign currency forward contracts	$ 5,230,000	$ 3,599,000	$ 5,230,000	$ 3,599,000
Unrealized gain of foreign currency forward contracts				17,000
Unrealized loss of foreign currency forward contracts			13,000
Foreign exchange contracts [Member]
Derivative Financial Instruments (Textual) [Abstract]
Realized gain from foreign currency forward contracts		38,000		123,000
Realized loss from foreign currency forward contracts	$ 50,000		$ 56,000