CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Expense related to director restricted stock unit (in shares)		78
Expense related to director restricted stock unit	116		116
Expense related to employee stock-based compensation	342		342
Exercise of stock options (in shares)		62
Exercise of stock options	226	$ 1	225
Net income	1,814			1,814
Ending Balance (in shares) at Dec. 31, 2020		12,544
Ending Balance at Dec. 31, 2020	$ 55,935	$ 13	86,551	(30,629)
Beginning Balance (in shares) at Sep. 30, 2021	12,714	12,714
Beginning Balance at Sep. 30, 2021	$ 65,608	$ 13	87,893	(22,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Expense related to director restricted stock unit	162		162
Expense related to employee stock-based compensation	338		338
Exercise of stock warrants (in shares)		54
Exercise of stock warrants	200		200
Net income	$ 7,804			7,804
Ending Balance (in shares) at Dec. 31, 2021	12,768	12,768
Ending Balance at Dec. 31, 2021	$ 74,112	$ 13	$ 88,593	$ (14,494)