Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2013	Sep. 30, 2016	Sep. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 27,120	$ 24,989	$ 16,934	$ 16,559	$ 16,990	$ 16,781	$ 15,893	$ 15,682	$ 85,602	$ 65,346
Gross Profit	6,229	5,456	3,224	2,917	3,387	3,038	2,730	2,533	17,826	11,688
Operating income	1,325	1,668	689	382	958	763	515	259	4,064	2,496
Other income (expense), net	(542)	(374)	(127)	(575)	1,466	(34)	(651)	(36)	(1,618)	744
Income before income taxes	783	1,294	562	(193)	2,424	729	(136)	223	2,446	3,240
Income Tax Expense (Benefit)	1,604	(518)	(225)	77	5,814	(292)	54	(89)	938	5,488
Net income	$ 2,387	$ 776	$ 337	$ (116)	$ 8,238	$ 437	$ (82)	$ 134	$ 3,384	$ 8,728
Net income (loss) per share - basic (dollars per share)	$ 0.23	$ 0.08	$ 0.03	$ (0.01)	$ 0.86	$ 0.05	$ (0.01)	$ 0.01	$ 0.34	$ 0.91
Net income (loss) per share - diluted (dollars per share)	$ 0.20	$ 0.07	$ 0.03	$ (0.01)	$ 0.82	$ 0.04	$ (0.01)	$ 0.01	$ 0.30	$ 0.87