Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Deficit	Total Shareholders' Equity	Non-controlling Interest
Beginning balance at Sep. 30, 2016	$ 65,339	$ 132		$ 111,631	$ (8,876)	$ (35,830)	$ 67,057	$ (1,718)
Beginning balance (in shares) at Sep. 30, 2016		13,179,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,086					9,131	9,131	(1,045)
Translation adjustment	423				347		347	76
Acquisition of non-controlling interest	2,687							$ 2,687
Tax benefit of stock compensation	18			18			18
Proceeds from stock offering, amount	10,632	$ 12		10,620			10,632
Proceeds from stock offering (in shares)		1,214,000
Stock compensation expense	1,328			1,328			1,328
Stock options exercised	1,970	$ 3		1,967			1,970
Stock options exercised (in shares)		318,000
Ending balance at Sep. 30, 2017	90,483	$ 147		125,564	(8,529)	(26,699)	90,483
Ending balance (in shares) at Sep. 30, 2017		14,711,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,305					5,305	5,305
Translation adjustment	(1,445)				(1,445)		(1,445)
Repurchase of treasury stock	(4,000)		$ (4,000)				(4,000)
Repurchase of treasury stock (in shares)			(771,000)
Retirement of treasury stock		$ (8)	$ 4,000	(3,992)
Retirement of treasury stock (in shares)		(771,000)	771,000
Stock compensation expense	855			855			855
Stock options exercised	1,892	$ 3		1,889			1,892
Stock options exercised (in shares)		277,000
Ending balance at Sep. 30, 2018	$ 93,090	$ 142		124,316	(9,974)	(21,394)	93,090
Ending balance (in shares) at Sep. 30, 2018	14,216,596	14,217,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (5,162)					(5,162)	(5,162)
Translation adjustment	(1,259)				(1,259)		(1,259)
Stock compensation expense	573			573			573
Stock options exercised	210	$ 1		209			210
Stock options exercised (in shares)		52,000
Ending balance at Sep. 30, 2019	$ 87,452	$ 143		$ 125,098	$ (11,233)	$ (26,556)	$ 87,452
Ending balance (in shares) at Sep. 30, 2019	14,268,797	14,269,000