Consolidated Statement of Stockholders' Equity - 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	(146)			(146)
Other comprehensive loss	(138)				(138)
Issuance of restricted stock, Shares		8,000
Forfeiture of restricted stock, Shares		(2,875)
Issuance of common stock pursuant to the vesting of restricted stock units, Shares		500
Issuance of common stock pursuant to exercise of options	$ 215		215
Issuance of common stock pursuant to the exercise of stock options, Shares	24,500	24,500
Stock-based compensation	$ 2,329	$ 0	2,329
Ending Balance at Sep. 30, 2019	$ 178,847	$ 136	88,660	105,808	(15,757)
Ending Balance, Shares at Sep. 30, 2019	13,630,666	13,630,666
Net loss	$ (19,242)			(19,242)
Other comprehensive loss	(941)				(941)
Forfeiture of restricted stock, Shares		(1,750)
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		41,723
Stock-based compensation	2,305		2,305
Ending Balance at Sep. 30, 2020	$ 160,970	$ 137	$ 90,965	$ 86,566	$ (16,698)
Ending Balance, Shares at Sep. 30, 2020	13,670,639	13,670,639