CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Net revenues:
Product revenues	$ 27,195	$ 34,403	$ 56,137	$ 71,999
Intellectual property revenues	2,542	2,489	3,591	2,640
Net revenues	29,737	36,892	59,728	74,639
Costs and expenses:
Cost of product revenues	10,595	12,995	22,758	27,343
Engineering, research and development	9,580	14,898	22,005	29,080
Selling, general and administrative	8,379	9,978	15,803	20,436
Restructuring and impairment charges	4	78	32	342
Amortization of intangible assets	79	61	146	226
Costs and expenses	28,637	38,010	60,744	77,427
Income (loss) from operations	1,100	(1,118)	(1,016)	(2,788)
Other expense (income):
Interest expense, net	1,924	2,039	3,873	4,558
Loss on compound embedded derivative	5,280	1,976	1,982	5,460
Loss on extinguishment of debt	0	3,874	0	3,874
Other expense (income), net	29	(41)	41	(56)
Other expense, net	7,233	7,848	5,896	13,836
Loss before income tax expense	(6,133)	(8,966)	(6,912)	(16,624)
Income tax expense	63	75	129	149
Net loss	$ (6,196)	$ (9,041)	$ (7,041)	$ (16,773)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.25)	$ (0.37)	$ (0.28)	$ (0.69)
Weighted average common shares outstanding - basic (in shares)	25,043	24,303	24,776	24,175
Weighted average common shares outstanding - diluted (in shares)	25,043	24,303	24,776	24,175