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Note 14 - Equity (Details Textual) - USD ($) shares in Thousands	2 Months Ended	3 Months Ended		9 Months Ended		19 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Aug. 02, 2021	Mar. 05, 2020
Stock Repurchase Program, Authorized Amount								$ 50,000,000
Stock Repurchased During Period, Shares (in shares)		1,100		3,000
Stock Repurchased During Period, Value		$ 7,134,688	$ 5,567,121	$ 20,264,547	$ 21,783,289	$ 48,800,000
New Repurchase Authorization [Member]
Stock Repurchase Program, Authorized Amount							$ 50,000,000
Stock Repurchased During Period, Shares (in shares)	0

X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
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