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Note 14 - Capital Stock (Details Textual) - USD ($)		3 Months Ended	12 Months Ended
	May 22, 2020	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Stock Issued During Period, Shares, New Issues (in shares)			1,260,042	2,245,229
Proceeds from Issuance of Private Placement	$ 150,008,000	$ 150,008
Private Placement [Member]
Stock Issued During Period, Shares, New Issues (in shares)	1,797,359
Sale of Stock, Price Per Share (in dollars per share)	$ 83.46

X

- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

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X

- Definition

Number of new stock issued during the period.

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-SubTopic 10
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