Note 4 Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Equity Securities	$ 3,124		$ 4,158
Auction Rate Preferred Securities	350		350
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds	89,646	[1],[2]	59,706	[1],[2]
Marketable Equity Securities	3,124	[1],[3]	4,158	[1],[3]
Auction Rate Preferred Securities	350	[1],[3]	350	[1],[3]
Derivative Liabilities	(67)	[1],[4]	(112)	[1],[4]
Fair Value, Net Asset (Liability)	93,053	[1]	64,102	[1]
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds	89,646	[1],[2]	59,706	[1],[2]
Marketable Equity Securities	3,124	[1],[3]	4,158	[1],[3]
Fair Value, Net Asset (Liability)	92,770	[1]	63,864	[1]
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction Rate Preferred Securities	350	[1],[3]	350	[1],[3]
Derivative Liabilities	(67)	[1],[4]	(112)	[1],[4]
Fair Value, Net Asset (Liability)	$ 283	[1]	$ 238	[1]

[1] We did not have any recurring assets whose fair value was measured using significant unobservable inputs.

[2] Included in "Cash and cash equivalents" on our unaudited condensed consolidated balance sheets.

[3] Included in "Other assets" on our unaudited condensed consolidated balance sheets.

[4] Included in "Accrued expenses and other current liabilities" on our unaudited condensed consolidated balance sheets.