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, 2018	$ 176,587	$ 136	$ 86,116	$ 105,954	$ (15,619)
Beginning Balance, Shares at Sep. 30, 2018		13,600,541
Net loss	(5,853)			(5,853)
Other comprehensive income (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)
Beginning Balance, Shares at Dec. 31, 2018		13,632,791
Forfeiture of restricted stock, Shares		(250)
Beginning Balance at Sep. 30, 2019	$ 178,847	$ 136	88,660	105,808	(15,757)
Beginning Balance, Shares at Sep. 30, 2019	13,630,666	13,630,666
Net loss	$ (1,289)			(1,289)
Other comprehensive income (loss)	566				566
Issuance of common stock pursuant to the vesting of restricted stock units	1	$ 1
Issuance of common stock pursuant to the vesting of restricted stock units, Shares		30,823
Stock-based compensation	590		590
Ending Balance at Dec. 31, 2019	$ 178,715	$ 137	$ 89,250	$ 104,519	$ (15,191)
Beginning Balance, Shares at Dec. 31, 2019	13,661,489	13,661,489