Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue	$ 30,176	$ 22,490
Cost of revenue	20,133	15,089
Gross profit	10,043	7,401
Operating expense:
Selling, general, and administrative	5,578	4,821
Research and development	2,199	2,560
Total operating expense	7,777	7,381
Operating income	2,266	20
Other income (expense):
Interest income (expense), net	23	(17)
Foreign exchange loss	(403)	(135)
Total other expense	(380)	(152)
Income (loss) from continuing operations before income tax expense	1,886	(132)
Income tax expense	(120)	(2)
Income (loss) from continuing operations	1,766	(134)
(Loss) income from discontinued operations, net of tax	(9)	1,121
Net income	1,757	987
Foreign exchange translation adjustment	(260)	(88)
Comprehensive income	$ 1,497	$ 899
Per share data:
Net income (loss) per basic share, continuing operations, (in usd per share)	$ 0.07	$ 0.00
Net income per basic share, discontinued operations (in usd per share)	0.00	0.04
Net income per basic share (in usd per share)	0.07	0.04
Net income (loss) per diluted share, continuing operations (in usd per share)	0.07	0.00
Net income per diluted share, discontinued operations (in usd per share)	0.00	0.04
Net income per diluted share (in usd per share)	$ 0.07	$ 0.04
Weighted-average number of basic shares outstanding (in shares)	26,279	25,697
Weighted-average number of basic shares outstanding (in shares)	27,039	25,697