Note 7 - Preferred Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Mar. 31, 2013
Note 7 - Preferred Stock (Details) [Line Items]
Preferred Stock, Dividends Per Share, Declared (in Dollars per share)	$ 0
Preferred Stock, Shares Outstanding (in Shares)	1,075	8,141	[1]
Percentage Of Common Stock Owned By Preferred Stock Holders	6.00%
Preferred Stock, Liquidation Preference, Value (in Dollars)	$ 9,699
Series C Preferred Stock [Member]
Note 7 - Preferred Stock (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)	$ 1,600
Preferred Stock, Dividend Rate, Percentage	8.00%
Preferred Stock, Shares Outstanding (in Shares)	1,075
Percentage Of Preferred Stock Owners In Pool	6.00%
Series C Preferred Stock [Member] | Maximum [Member]
Note 7 - Preferred Stock (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)	$ 2,400
Excluding Undeclared Dividends [Member]
Note 7 - Preferred Stock (Details) [Line Items]
Preferred Stock, Liquidation Preference, Value (in Dollars)	$ 1,720

[1] Derived from the Company's audited consolidated financial statements. The accompanying notes are an integral part of these condensed consolidated financial statements.