CONDENSED CONSOLIDATED STATEMENTS of CHANGES in STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Treasury Stock, at cost
Beginning balance (shares) at Sep. 30, 2019		10,338,548
Beginning Balance at Sep. 30, 2019	$ 31,240	$ 103	$ 48,001	$ (15,275)	$ (1,589)
Net income	1,189			1,189
Stock-based compensation	152		152
Restricted stock units vested, net of shares withheld for payment of taxes (shares)		6,367
Vested restricted stock and restricted stock units, net of shares withheld for payment of taxes	$ (24)		(24)
Exercise of stock options, net of shares surrendered (shares)	24,000	24,000
Exercise of stock options	$ 130		130
Employee stock plan purchases (shares)		6,449
Exercise of stock options, net of shares surrendered	40		40
Ending Balance at Dec. 27, 2019	$ 32,727	$ 103	48,299	(14,086)	(1,589)
Ending balance (shares) at Dec. 27, 2019		10,375,364
Beginning balance (shares) at Sep. 30, 2020	10,500,726	10,500,726
Beginning Balance at Sep. 30, 2020	$ 39,155	$ 105	49,161	(8,522)	(1,589)
Net income	1,537			1,537
Stock-based compensation	242		242
Restricted stock units vested, net of shares withheld for payment of taxes (shares)		57,455
Vested restricted stock and restricted stock units, net of shares withheld for payment of taxes	$ (400)	$ 1	(401)
Exercise of stock options, net of shares surrendered (shares)	14,000	14,000
Exercise of stock options	$ 68		68
Employee stock plan purchases (shares)		5,852
Exercise of stock options, net of shares surrendered	45		45
Ending Balance at Jan. 01, 2021	$ 40,647	$ 106	$ 49,115	$ (6,985)	$ (1,589)
Ending balance (shares) at Jan. 01, 2021	10,578,033	10,578,033