Note 3 - Restatement of Previously Issued Financial Statements and Adoption of New Accounting Standard - Adjustment of Financial Statements and Footnotes (Details) - USD ($)	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2019
Deferred Revenue, Total	$ 2,106,514	$ 484,121
Accumulated deficit	(2,786,356)	(1,306,757)	$ (2,733,000)
Revenues, Total	3,684,939	3,725,006
Gross profit	972,213	1,807,116
Operating loss	(1,489,625)	(1,921,626)
Net loss	$ (1,479,599)	$ (1,913,127)
Basic (in dollars per share)	$ (0.80)	$ (1.04)
Diluted (in dollars per share)	$ (0.80)	$ (1.04)
Deferred revenue	$ 1,622,393	$ 484,121
Total stockholders’ equity	1,533,056	3,016,233
Tax expense (benefit) at U.S. statutory rate	(362,946)	(650,463)
State income tax provision, net of federal benefit	(70,523)	(105,000)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(918,288)	801,020
Deferred revenue	568,917	187,970
Valuation allowance	(3,993,088)	(4,911,376)
Decrease in restricted cash
Cash provided by investing activities	306,338	422,242
Net decrease in cash, cash equivalents and restricted cash	685,831	(1,320,025)
Cash, cash equivalents and restricted cash at beginning of year	1,296,603	2,616,628
Cash, cash equivalents and restricted cash at end of year	1,982,434	1,296,603
Previously Reported [Member]
Deferred Revenue, Total
Accumulated deficit		(822,636)
Revenues, Total		4,209,127
Gross profit		2,291,237
Operating loss		(1,437,505)
Net loss		$ (1,429,006)
Basic (in dollars per share)		$ (0.78)
Diluted (in dollars per share)		$ (0.78)
Deferred revenue
Total stockholders’ equity		3,500,354
Tax expense (benefit) at U.S. statutory rate		(485,862)
State income tax provision, net of federal benefit		(81,630)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		613,050
Deferred revenue
Valuation allowance		(4,723,406)
Decrease in restricted cash		14,662
Cash provided by investing activities		436,904
Net decrease in cash, cash equivalents and restricted cash		(1,305,363)
Cash, cash equivalents and restricted cash at beginning of year	1,283,673	2,589,036
Cash, cash equivalents and restricted cash at end of year		1,283,673
Restatement Adjustment [Member]
Deferred Revenue, Total		484,121
Accumulated deficit		(484,121)
Revenues, Total		(484,121)
Gross profit		(484,121)
Operating loss		(484,121)
Net loss		$ (484,121)
Basic (in dollars per share)		$ (0.26)
Diluted (in dollars per share)		$ (0.26)
Deferred revenue		$ 484,121
Total stockholders’ equity		(484,121)
Tax expense (benefit) at U.S. statutory rate		(164,601)
State income tax provision, net of federal benefit		(23,370)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		187,970
Deferred revenue		187,970
Valuation allowance		(187,970)
Decrease in restricted cash		(14,662)
Cash provided by investing activities		(14,662)
Net decrease in cash, cash equivalents and restricted cash		(14,662)
Cash, cash equivalents and restricted cash at beginning of year	$ 12,930	27,592
Cash, cash equivalents and restricted cash at end of year		$ 12,930