Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Available-for-Sale, Amortized Cost	$ 647,579	$ 561,580
Equity Securities, Cost	$ 43,002	$ 42,352
Preferred Stock, Par Value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized (in shares)	5,000,000	5,000,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0
Common Stock, Par Value (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized (in shares)	500,000,000	500,000,000
Common Stock, Shares, Issued (in shares)	24,730,885	25,027,467
Common Stock, Shares, Outstanding (in shares)	24,730,885	25,027,467