Fair Value Disclosures Disclosures related to our financial assets (Details) (USD $)	1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 31, 2013	Dec. 31, 2014	Dec. 31, 2014	Mar. 31, 2014
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost		$ 79,164,000	$ 79,164,000	$ 16,868,000
Gross unrecognized holding losses		(153,000)	(153,000)	0
Available-for-sale marketable securities		79,011,000	79,011,000	16,868,000
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		79,011,000	79,011,000	16,868,000
iTVX, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
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%
Contingent consideration fixed stock price (usd per share)	$ 21.795
iTVX, Inc. [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Undiscounted amount of contingent consideration, range of outcomes, low	500,000
Undiscounted amount of contingent consideration, range of outcomes, high	7,000,000
Contingent consideration liability	2,000,000
Selling, General and Administrative Expenses [Member] | iTVX, Inc. [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value remeasurement of contingent consideration liability		900,000	1,000,000
Accrued Compensation [Member] | 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		$ 5,700,000	$ 5,700,000