CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Sep. 30, 2017	$ 194,803	$ 134	$ 83,733	$ 125,166	$ (14,230)
Beginning Balance, Shares at Sep. 30, 2017		13,438,616
Net loss	(9,480)			(9,480)
Other comprehensive loss	(256)				(256)
Issuance of restricted stock		$ 2	(2)
Issuance of restricted stock, Shares		138,650
Forfeiture of restricted stock, Shares		(16,675)
Stock-based compensation	826		826
Ending Balance at Dec. 31, 2017	185,893	$ 136	84,557	115,686	(14,486)
Ending Balance, Shares at Dec. 31, 2017		13,560,591
Beginning Balance at Sep. 30, 2018	$ 176,587	$ 136	86,116	105,954	(15,619)
Beginning Balance, Shares at Sep. 30, 2018	13,600,541	13,600,541
Net loss	$ (5,853)			(5,853)
Other comprehensive loss	(154)				(154)
Issuance of restricted stock, Shares		8,000
Forfeiture of restricted stock, Shares		(250)
Issuance of common stock pursuant to the exercise of stock options	215		215
Issuance of common stock pursuant to the exercise of stock options, Shares		24,500
Stock-based compensation	602		602
Ending Balance at Dec. 31, 2018	$ 171,397	$ 136	$ 86,933	$ 100,101	$ (15,773)
Ending Balance, Shares at Dec. 31, 2018	13,600,541	13,632,791