Derivative Financial Instruments (Details Textual) (USD $)	3 Months Ended	6 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Financial Instruments (Textual) [Abstract]
Notional amount of open foreign currency forward contracts	$ 5,131,000	$ 7,281,000	$ 5,131,000	$ 7,281,000
Unrealized gain of foreign currency forward contracts				366,000
Unrealized loss of foreign currency forward contracts				91,000
Foreign exchange contracts [Member]
Derivative Financial Instruments (Additional Textual) [Abstract]
Realized gain from foreign currency forward contracts		85,000		85,000
Realized loss from foreign currency forward contracts	$ 6,000		$ 6,000

The amount of gain recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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The amount of loss recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References+ Details