Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid- In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)
Beginning balance (in shares) at Sep. 30, 2017		14,711,000
Beginning balance at Sep. 30, 2017	$ 90,483	$ 147	$ 125,564	$ (8,529)	$ (26,699)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	6,452				6,452
Translation adjustment	541			541
Stock compensation expense	253		253
Stock options exercised (in shares)		165,000
Stock options exercised	1,200	$ 2	1,198
Ending balance (in shares) at Dec. 31, 2017		14,876,000
Ending balance at Dec. 31, 2017	$ 98,929	$ 149	127,015	(7,988)	(20,247)
Beginning balance (in shares) at Sep. 30, 2018	14,216,596	14,217,000
Beginning balance at Sep. 30, 2018	$ 93,090	$ 142	124,316	(9,974)	(21,394)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(2,372)				(2,372)
Translation adjustment	(576)			(576)
Stock compensation expense	169		169
Stock options exercised (in shares)		11,000
Stock options exercised	$ 37	$ 0	37
Ending balance (in shares) at Dec. 31, 2018	14,227,580	14,228,000
Ending balance at Dec. 31, 2018	$ 90,348	$ 142	$ 124,522	$ (10,550)	$ (23,766)