Intangible Assets (Details Textual) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets, excluding amortization of internal use software	$ 300,000
Amortization of intangible assets	794,000	855,000
Finite-lived intangible assets, net	2,398,000		2,083,000
Developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		200,000
Developed Technology Acquired [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	$ 600,000