Fair Value Disclosures Disclosures related to our financial assets (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Aug. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jul. 31, 2015	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in receivables		$ 900	$ 671
Fair Value, Inputs, Level 1 [Member]
Available-for-sale marketable securities
Amortized cost		71,217			$ 80,522
Gross unrecognized holding losses		(226)			(204)
Fair value		70,991			80,318
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities		70,991			80,318
iTVX, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability					4,500
Contingent consideration earnout period in years	2 years
Contingent consideration percentage of payment paid in cash	25.00%
Contingent consideration percentage of payment paid in stock	75.00%
Fair value remeasurement of contingent consideration liability		(4,000)
Change in receivables		(300)
iTVX, Inc. [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	$ 2,000	500			$ 4,500
Subsequent Event [Member] | iTVX, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability				$ 500
Selling, General and Administrative Expenses [Member] | iTVX, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value remeasurement of contingent consideration liability		$ (3,700)