Goodwill and Intangible Assets (Details Textual) (USD $)	12 Months Ended						3 Months Ended	12 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2013 segment	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013 Developed technology [Member]	Mar. 31, 2012 Developed technology [Member]	Mar. 31, 2011 Developed technology [Member]	Mar. 31, 2012 Asset Impairment and Related Charges [Member]	Mar. 31, 2013 Asset Impairment and Related Charges [Member]	Mar. 31, 2011 Asset Impairment and Related Charges [Member] HSG [Member]	Jun. 30, 2010 Asset Impairment and Related Charges [Member] HSG [Member]	Mar. 31, 2011 Asset Impairment and Related Charges [Member] HSG [Member]
Goodwill [Line Items]
Number of business operating segments	2
Impairment of finite-lived intangible assets							$ 8,100,000			$ 100,000
Impairment of indefinite-lived intangible assets									900,000
Impairment of intangible assets											1,000,000
Impairment of fixed assets							500,000
Asset impairment charges							1,100,000	100,000
Amortization of intangible assets, excluding amortization of internal use software	1,200,000	1,200,000	1,200,000
Amortization of intangible assets	$ 3,382,000	$ 3,686,000	$ 5,122,000	$ 800,000	$ 1,700,000	$ 1,800,000