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Note 8 - Debt and Commitments (Details Textual)	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2020 USD ($)	Nov. 30, 2015 USD ($) ft² a	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2019 USD ($)
Proceeds from Issuance of Debt					$ 1,000,000
Investment Margin Account			$ 30,493,000		30,493,000			$ 29,493,000
Payments to Acquire Property, Plant, and Equipment, Total				$ 13,000	168,000	$ 97,000
Loans Payable to Bank, Total			1,740,000		1,740,000
UTAH | Building [Member]
Area of Real Estate Property (Square Foot) | ft²		30,700
UTAH | Land [Member]
Area of Land (Acre) | a		3.6
UTAH | Land and Building [Member]
Payments to Acquire Property, Plant, and Equipment, Total		$ 1,240,000
Margin Account [Member]
Proceeds from Issuance of Debt			1,000,000				$ 29,500,000
Investment Margin Account			$ 30,500,000		$ 30,500,000
Margin Account [Member] | Fed Funds Rate [Member]
Debt Instrument, Basis Spread on Variable Rate							0.50%
Debt Instrument, Interest Rate, Effective Percentage			0.75%		0.75%
Margin Account [Member] | Subsequent Event [Member]
Repayments of Debt	$ 1,000,000
Real Estate Bank Loan Secured by Logan Office [Member]
Loans Payable to Bank, Total		$ 2,260,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.66%
Debt Instrument, Periodic Payment, Total		$ 17,600

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Loan carried out from the Investment Margin Account with the marketable securities pledged as collateral.

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Area of land held.

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Area of a real estate property.

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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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Including the current and noncurrent portions, carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the normal operating cycle if longer.

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