Note 8 - Common Stock (Details Textual) - USD ($) shares in Thousands, $ in Millions		3 Months Ended
	Mar. 07, 2024	Mar. 31, 2025	Mar. 31, 2024
The 2024 Share Repurchase Plan [Member]
Share Repurchase Program, Authorized, Amount	$ 2.5
Treasury Stock, Shares, Acquired (in shares)	0
Common Class A [Member]
Stock Issued During Period, Shares, New Issues (in shares)		0	0
Common Class B [Member]
Stock Issued During Period, Shares, New Issues (in shares)		0	0
Common Class C [Member]
Stock Issued During Period, Shares, New Issues (in shares)		0