Note 3 - Equity - Share Repurchase Program (Details) - USD ($)	3 Months Ended
Dec. 31, 2021	Sep. 30, 2021
Total number of shares purchased (in shares)	244,552	7,600
Average price paid per share (in dollars per share)	$ 5.85	$ 5.43
Amount available for future share repurchases under the plans or programs	$ 10,579,912
Share Repurchase Program [Member]
Total number of shares purchased (in shares)	962,946	718,394
Amount available for future share repurchases under the plans or programs	$ 10,579,912	$ 12,009,609

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration