Note 4 - Debts and Commitments - Future Obligations (Details)	Sep. 30, 2021 USD ($)
Payments due by Fiscal Year One	$ 155,000
Payments due by Fiscal Year Two	67,000
Payments due by Fiscal Year Three	3,000
Payments due by Fiscal Year Total	225,000
Payments due by Fiscal Year One	303,000
Payments due by Fiscal Year Two	1,322,000
Payments due by Fiscal Year Three	700,000
Payments due by Fiscal Year Four	588,000
Payments due by Fiscal Year Five	546,000
Payments due by Fiscal Year After Year Five	1,624,000
Payments due by Fiscal Year Total	5,083,000
Real Estate Loan [Member]
Payments due by Fiscal Year One	148,000
Payments due by Fiscal Year Two	153,000
Payments due by Fiscal Year Three	158,000
Payments due by Fiscal Year Four	164,000
Payments due by Fiscal Year Five	169,000
Payments due by Fiscal Year After Year Five	786,000
Payments due by Fiscal Year Total	1,578,000
Long Term Accrued Liabilities [Member]
Payments due by Fiscal Year Two	1,102,000
Payments due by Fiscal Year Three	539,000
Payments due by Fiscal Year Four	424,000
Payments due by Fiscal Year Five	377,000
Payments due by Fiscal Year After Year Five	838,000
Payments due by Fiscal Year Total	$ 3,280,000