Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net revenues:
Net product sales	$ 156,975	$ 193,530
Licensing revenue	6,276	7,311
Net revenues	163,251	200,841
Costs and expenses:
Cost of sales	142,270	172,917
Other operating costs and expenses	1,352	1,636
Selling, general and administrative expenses	7,764	7,383
Total costs and expenses	151,386	181,936
Operating income	11,865	18,905
Other income:
Gain on settlement of litigation		1,806
Realized gain on sale of marketable securities	828	966
Gain on sale of building	347
Interest income, net	70	32
Total other income	1,245	2,804
Income before income taxes	13,110	21,709
Provision for income taxes	2,476	5,791
Net income	$ 10,634	$ 15,918
Basic net income per share	$ 0.39	$ 0.59
Diluted net income per share	$ 0.39	$ 0.59
Weighted average shares outstanding
Basic	27,130	27,130
Diluted	27,130	27,130