Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Sales
License sales	$ 240	$ 50,625
Net sales	240	50,625
Costs and expenses
General and administrative	2,856	5,094
Total costs and expenses	2,856	5,094
Operating income (loss)	(2,616)	45,531
Interest income and other	13	12
Income (loss) before provision for income taxes	(2,603)	45,543
Provision for income taxes	446	19,923
Net income (loss)	$ (3,049)	$ 25,620
Basic net income (loss) per share (in Dollars per share)	$ (0.26)	$ 2.20
Shares used in computing basic per share amounts (in Shares)	11,646	11,645
Diluted net income (loss) per share (in Dollars per share)	$ (0.26)	$ 2.20
Shares used in computing diluted per share amounts (in Shares)	11,646	11,645