CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)
Beginning Balance (in shares) at Sep. 30, 2020		12,404
Beginning Balance at Sep. 30, 2020	$ 53,437	$ 12	$ 85,868	$ (32,443)
Expense related to director restricted stock unit (shares)		141
Expense related to director restricted stock units	467		467
Expense related to employee stock options	1,193		1,193
Exercise of stock options (shares)		175
Exercise of stock options	434	$ 1	433
Net income	10,145			10,145
Cancellation of common stock (in shares)		(6)
Cancellation of common stock	$ (68)		(68)
Ending Balance (in shares) at Sep. 30, 2021	12,714	12,714
Ending Balance at Sep. 30, 2021	$ 65,608	$ 13	87,893	(22,298)
Expense related to director restricted stock unit (shares)		0
Expense related to director restricted stock units	648		648
Expense related to employee stock options	1,960		1,960
Stock issued for director restricted stock units (in shares)		53
Stock issued for director restricted stock units	$ 0
Exercise of stock options (shares)	257	257
Exercise of stock options	$ 637	$ 0	637
Common stock surrendered for the exercise of stock options (in shares)		(31)
Common stock surrendered for the exercise of stock options	(281)		(281)
Exercise of stock warrants (in shares)		54
Exercise of stock warrants	200		200
Net income	$ 23,288			23,288
Ending Balance (in shares) at Sep. 30, 2022	12,714	13,047
Ending Balance at Sep. 30, 2022	$ 92,060	$ 13	$ 91,057	$ 990