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Note 20 - Subsequent Events (Details Textual) - USD ($)	Mar. 25, 2022	Jan. 25, 2022	Mar. 18, 2022	Feb. 18, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Warrant or Right, Outstanding (in shares)					105,556	105,556	105,556
Subsequent Event [Member] | Common Class A [Member] | Outside Director [Member]
Stock Issued During Period, Shares, New Issues (in shares)	75,000
Subsequent Event [Member] | Common Class A [Member] | Investor [Member]
Stock Issued During Period, Shares, New Issues (in shares)	206,250
Subsequent Event [Member] | SHG Corporation [Member]
Business Acquisition, Share Price (in dollars per share)		$ 10
Business Combination, Consideration Transferred, Total		$ 326,000,000
SHG Corporation [Member] | Subsequent Event [Member]
Equity Method Investment, Shares (in shares)		4,500,000
Payments to Acquire Businesses, Gross		$ 45,000,000
Payments for Deferred Underwriting Fees		4,759,615
Payment of Note Receivable		$ 1,000,000
Equity Method Investment, Ownership Percentage				15.60%
SHG Corporation [Member] | Subsequent Event [Member] | SHG Corporation [Member]
Class of Warrant or Right, Outstanding (in shares)			7,719,779
SHG Corporation [Member] | Subsequent Event [Member] | Class A Common Stock Warrant [Member]
Equity Method Investment, Shares (in shares)			13,118,474

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