Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred stock	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive loss	Receivable for common stock issued	Treasury stock
Beginning balance at Sep. 30, 2018	$ (6,458)	$ 1,651	$ 51	$ 200,130	$ (207,419)	$ (676)	$ (26)	$ (169)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	164			164
Conversion of preferred stock	0	(563)	2	561
Preferred stock dividends	0	53		(53)
Foreign currency translation adjustment	62					62
Net loss	(1,788)				(1,788)
Ending balance at Dec. 31, 2018	(6,329)	1,141	53	200,802	(207,516)	(614)	(26)	(169)
Beginning balance at Sep. 30, 2019	(6,253)	0	67	203,735	(209,340)	(546)	0	(169)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	52			52
Foreign currency translation adjustment	(8)					(8)
Net loss	(820)				(820)
Ending balance at Dec. 31, 2019	$ (7,029)	$ 0	$ 67	$ 203,787	$ (210,160)	$ (554)	$ 0	$ (169)