Note 6 - Equity - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Mar. 15, 2024	Jun. 30, 2025	Mar. 31, 2025	Mar. 31, 2024	May 12, 2025
Class A Common Stock
EQUITY
Dividends paid amount	$ 6.0
Class A Common Stock | Q1 2024 Dividends
EQUITY
Payment of dividends				$ 6.1
Dividend declared				$ 0.1375
Date dividends declared				Dec. 06, 2023
Date of dividend record				Mar. 01, 2024
Date of dividend paid				Mar. 15, 2024
Class A Common Stock | Q1 2025 Dividends
EQUITY
Dividend declared			$ 0.1375
Date dividends declared			Dec. 05, 2024
Date of dividend record			Feb. 28, 2025
Date of dividend paid			Mar. 14, 2025
Class A Common Stock | Q2 2025 Dividends
EQUITY
Dividend declared		$ 0.06875
Date dividends declared		Mar. 17, 2025
Date of dividend record		May 30, 2025
Date of dividend paid		Jun. 13, 2025
Class B Common Stock
EQUITY
Dividend payable per share					$ 0.1811
Class B Common Stock | Q1 2024 Dividends
EQUITY
Payment of dividends				$ 2.1
Dividend declared				$ 0.2416
Date dividends declared				Feb. 01, 2024
Date of dividend record				Mar. 01, 2024
Date of dividend paid				Mar. 15, 2024
Class B Common Stock | Q1 2025 Dividends
EQUITY
Dividend declared			$ 0.1971
Date dividends declared			Feb. 18, 2025
Date of dividend record			Feb. 28, 2025
Date of dividend paid			Mar. 14, 2025
Restricted Stock Units
EQUITY
Payment of dividends				$ 0.1