Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- In Capital	Accum-ulated Other Compre-hensive Income (Loss)	Retained Deficit	Total Share-holders’ Equity	Non-control-ling Interest
Beginning balance (in shares) at Sep. 30, 2015		13,150,000	0
Beginning balance at Sep. 30, 2015	$ 72,647	$ 131	$ 0	$ 110,191	$ (8,666)	$ (28,822)	$ 72,834	$ (187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(8,550)					(7,008)	(7,008)	(1,542)
Translation adjustment	(199)				(210)		(210)	11
Restricted shares released (in shares)		14,000
Restricted shares released	0	$ 0		0			0
Stock compensation expense	1,390			1,390			1,390
Stock options exercised (in shares)		15,000
Stock options exercised	51	$ 1		50			51
Ending balance (in shares) at Sep. 30, 2016		13,179,000	0
Ending balance at Sep. 30, 2016	65,339	$ 132	$ 0	111,631	(8,876)	(35,830)	67,057	(1,718)
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 (in shares)		1,214,000
Proceeds from stock offering, amount	10,632	$ 12		10,620			10,632
Stock compensation expense	1,328			1,328			1,328
Stock options exercised (in shares)		318,000
Stock options exercised	$ 1,970	$ 3		1,967			1,970
Ending balance (in shares) at Sep. 30, 2017	14,710,591	14,711,000	0
Ending balance at Sep. 30, 2017	$ 90,483	$ 147	$ 0	125,564	(8,529)	(26,699)	90,483	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,305					5,305	5,305	0
Translation adjustment	$ (1,445)				(1,445)		(1,445)	0
Repurchase of treasury stock (in shares)	(771,149)		(771,000)
Repurchase of treasury stock	$ (4,000)		$ (4,000)				(4,000)
Retirement of treasury stock (in shares)		(771,000)	771,000
Retirement of treasury stock	0	$ (8)	$ 4,000	(3,992)
Stock compensation expense	855			855			855
Stock options exercised (in shares)		277,000
Stock options exercised	$ 1,892	$ 3		1,889			1,892
Ending balance (in shares) at Sep. 30, 2018	14,216,596	14,217,000	0
Ending balance at Sep. 30, 2018	$ 93,090	$ 142	$ 0	$ 124,316	$ (9,974)	$ (21,394)	$ 93,090	$ 0