Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenue	$ 21,194	$ 13,596	$ 58,667	$ 41,212
Cost of revenue	13,511	10,937	39,426	33,264
Gross profit	7,683	2,659	19,241	7,948
Operating expense:
Selling, general, and administrative	4,543	5,364	19,124	15,348
Research and development	2,274	2,340	6,470	6,840
Gain from change in estimate on ARO obligation	0	0	(845)	0
Loss on sale of assets	0	0	228	0
Total operating expense	6,817	7,704	24,977	22,188
Operating income (loss)	866	(5,045)	(5,736)	(14,240)
Other income (expense):
Interest income (expense), net	4	(134)	39	(377)
Foreign exchange gain (loss)	50	(12)	101	(2)
Gain on sale of investment	0	0	0	307
Change in fair value of financial instruments	0	110	122	39
Total other income (expense)	54	(36)	262	(33)
Income (loss) from continuing operations before income tax (expense) benefit	920	(5,081)	(5,474)	(14,273)
Income tax (expense) benefit	(456)	732	1,852	1,379
Income (loss) from continuing operations	464	(4,349)	(3,622)	(12,894)
Income from discontinued operations, net of tax	1,976	1,199	65,242	2,258
Net income (loss)	2,440	(3,150)	61,620	(10,636)
Foreign exchange translation adjustment	170	0	(549)	2
Comprehensive income (loss)	$ 2,610	$ (3,150)	$ 61,071	$ (10,634)
Net income (loss) per basic share:
Net income (loss) per basic shares, continuing operations (USD per share)	$ 0.02	$ (0.14)	$ (0.11)	$ (0.42)
Net income (loss) per basic shares, discontinued operations (USD per share)	0.06	0.04	2.07	0.07
Net income (loss) per basic share (USD per share)	0.08	(0.10)	1.96	(0.35)
Net income (loss) per diluted share:
Net income (loss) per diluted share, continuing operations (USD per share)	0.02	(0.14)	(0.11)	(0.42)
Net income (loss) per diluted share, discontinued operations (USD per share)	0.06	0.04	2.07	0.07
Net income (loss) per diluted share (USD per share)	$ 0.08	$ (0.10)	$ 1.96	$ (0.35)
Weighted average number of shares outstanding, basic (shares)	31,203	30,656	31,494	30,327
Weighted average number of shares outstanding, diluted (shares)	31,432	30,656	31,494	30,327