Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenue	$ 22,376	$ 21,194	$ 66,398	$ 58,667
Cost of revenue	14,964	13,511	44,563	39,426
Gross profit	7,412	7,683	21,835	19,241
Operating expense (income):
Selling, general, and administrative	6,125	4,543	15,771	19,124
Research and development	2,405	2,274	7,529	6,470
Recovery of previously incurred litigation related fees and expenses from arbitration award	(2,599)	0	(2,599)	0
Gain from change in estimate on ARO obligation	0	0	0	(845)
(Gain) loss on sale of assets	(41)	0	(41)	228
Total operating expense	5,890	6,817	20,660	24,977
Operating income (loss)	1,522	866	1,175	(5,736)
Other income (expense):
Interest income, net	32	4	40	39
Foreign exchange (loss) gain	(201)	50	(311)	101
Change in fair value of financial instruments	0	0	0	122
Total other (expense) income	(169)	54	(271)	262
Income (loss) from continuing operations before income tax (expense) benefit	1,353	920	904	(5,474)
Income tax (expense) benefit	(175)	(456)	(22)	1,852
Income (loss) from continuing operations	1,178	464	882	(3,622)
Income from discontinued operations, net of tax	123	1,976	5,388	65,242
Net income	1,301	2,440	6,270	61,620
Foreign exchange translation adjustment	(185)	170	(230)	(549)
Comprehensive income	$ 1,116	$ 2,610	$ 6,040	$ 61,071
Per share data:
Net income (loss) per basic share, continuing operations, (in usd per share)	$ 0.05	$ 0.02	$ 0.04	$ (0.11)
Net income per basic share, discontinued operations (in usd per share)	0.00	0.06	0.20	2.07
Net income per basic share (in usd per share)	0.05	0.08	0.24	1.96
Net income (loss) per diluted share, continuing operations (in usd per share)	0.05	0.02	0.04	(0.11)
Net income per diluted share, discontinued operations (in usd per share)	0.00	0.06	0.20	2.07
Net income per diluted share (in usd per share)	$ 0.05	$ 0.08	$ 0.24	$ 1.96
Weighted-average number of basic shares outstanding (in shares)	26,103	31,203	25,913	31,494
Weighted-average number of basic shares outstanding (in shares)	26,269	31,432	26,186	31,494