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Note 8 - Note Receivable - Summary of Note Receivable (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Sep. 30, 2020
Note receivable	$ 295,000	$ 295,000
Repayment of note	(3,000)	0
Allowance for doubtful account	(100,000)	(100,000)
Note receivable, net of allowance	192,000	195,000
Current portion, net of allowance	82,000	82,000	$ 82,000	$ 295,000
Note receivable, net of allowance	$ 110,000	$ 113,000	$ 113,000

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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