Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenue	$ 22,490	$ 18,416
Cost of revenue	15,089	13,237
Gross profit	7,401	5,179
Operating expense (income):
Selling, general, and administrative	4,821	8,627
Research and development	2,560	2,174
Gain from change in estimate on ARO obligation	0	(845)
Loss on sale of assets	0	228
Total operating expense	7,381	10,184
Operating income (loss)	20	(5,005)
Other income (expense):
Interest expense, net	(17)	(130)
Foreign exchange (loss) gain	(135)	57
Change in fair value of financial instruments	0	36
Total other expense	(152)	(37)
Loss from continuing operations before income tax (expense) benefit	(132)	(5,042)
Income tax (expense) benefit	(2)	1,912
Loss from continuing operations	(134)	(3,130)
Income from discontinued operations, net of tax	1,121	59,258
Net income	987	56,128
Foreign exchange translation adjustment	(88)	(711)
Comprehensive income	$ 899	$ 55,417
Per share data:
Net (loss) income per basic and diluted share, continuing operations, (in usd per share)	$ 0.00	$ (0.10)
Net income per basic and diluted share, discontinued operations (in usd per share)	0.04	1.90
Net income per basic and diluted share (in usd per share)	$ 0.04	$ 1.80
Weighted-average number of basic and diluted shares outstanding (in shares)	25,697	31,217