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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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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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Amount of the required periodic payments including both interest and principal payments.

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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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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Note 9 - Debt and Commitments (Details Textual)			1 Months Ended	3 Months Ended		12 Months Ended
Note 9 - Debt and Commitments (Details Textual)	Oct. 31, 2020 USD ($)	Nov. 30, 2015 USD ($) ft² a	Nov. 30, 2015 USD ($) ft² a	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2020 USD ($)
Investment Margin Account				$ 15,000,000			$ 29,493,000
Payments to Acquire Property, Plant, and Equipment, Total				(0)	$ 97,000
Loans Payable to Bank, Total				1,686,000
UTAH \| Building [Member]
Area of Real Estate Property (Square Foot) \| ft²		30,700	30,700
UTAH \| Land [Member]
Area of Land (Acre) \| a		3.6	3.6
Payments to Acquire Property, Plant, and Equipment, Total		$ 1,240,000
Margin Account [Member]
Proceeds from Issuance of Debt						$ 29,500,000
Repayments of Debt						$ 14,493,000
Investment Margin Account				$ 15,000,000
Margin Account [Member] \| Fed Funds Rate [Member]
Debt Instrument, Basis Spread on Variable Rate						0.50%
Debt Instrument, Interest Rate, Effective Percentage				0.75%
Real Estate Bank Loan Secured by Logan Office [Member]
Loans Payable to Bank, Total		$ 2,260,000	$ 2,260,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.33%	4.66%	4.66%
Debt Instrument, Periodic Payment, Total	$ 16,600		$ 17,600
Long-term Debt, Term (Year)	10 years