CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Net revenues:
Product revenues	$ 102,751	$ 101,334	$ 109,920
Intellectual property revenues	5,746	2,439	9,563
Net revenues	108,497	103,773	119,483
Costs and expenses:
Cost of product revenues	44,480	46,763	46,407
Engineering, research and development	42,450	41,927	42,713
Selling, general and administrative	30,981	30,210	29,822
Restructuring and impairment	0	0	(1,424)
Amortization of intangible assets	360	347	330
Costs and expenses	118,271	119,247	117,848
(Loss) income from operations	(9,774)	(15,474)	1,635
Other expense (income):
Interest expense, net	6,227	7,916	7,778
Gain on compound embedded derivative	0	(803)	(4,897)
Loss on extinguishment of debt	1,594	0	0
Other expense, net	139	39	40
Other expense, net	7,960	7,152	2,921
Loss before income tax expense (benefit)	(17,734)	(22,626)	(1,286)
Income tax expense (benefit)	341	(548)	(174)
Net loss	$ (18,075)	$ (22,078)	$ (1,112)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.30)	$ (0.55)	$ (0.04)
Weighted average common shares outstanding - basic and diluted (in shares)	60,887	40,311	25,121