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Note 4 - Debt and Commitments (Details Textual)	1 Months Ended	12 Months Ended
	Nov. 30, 2015 USD ($) ft² a	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2013 USD ($)	Oct. 31, 2020
Proceeds from Issuance of Debt		$ 17,000,000	$ 1,000,000
Payments to Acquire Property, Plant, and Equipment, Total		29,000	184,000
Operating Lease, Expense		$ 286,000	$ 612,000
Measurement Input, Discount Rate [Member]
Incentive Plan Future Commitment, Measurement Input		6.00%
UTAH | Building [Member]
Area of Real Estate Property (Square Foot) | ft²	30,700
UTAH | Land [Member]
Area of Land (Acre) | a	3.6
Payments to Acquire Property, Plant, and Equipment, Total	$ 1,240,000
Margin Account [Member]
Proceeds from Issuance of Debt				$ 29,500,000
Debt Instrument, Interest Rate, Effective Percentage		0.75%
Margin Account [Member] | Fed Funds Rate [Member]
Debt Instrument, Basis Spread on Variable Rate				0.50%
Real Estate Bank Loan Secured by Logan Office [Member]
Loans Payable to Bank, Total	$ 2,260,000	$ 1,580,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	4.66%				3.33%
Long-term Debt, Term (Year)					10 years
Debt Instrument, Periodic Payment, Total		$ 16,700

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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