Note 8 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended				12 Months Ended
	Dec. 17, 2022	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Preferred Stock, Shares Authorized (in shares)		50,000,000				50,000,000	50,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01				$ 0.01	$ 0.01
Preferred Stock, Shares Outstanding (in shares)		0				0	0
Common Stock, Shares Authorized (in shares)		450,000,000				450,000,000	450,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01				$ 0.01	$ 0.01
Common Stock, Shares, Issued (in shares)		144,861,465				144,861,465
Common Stock, Shares, Outstanding (in shares)		144,386,484				144,386,484	143,366,482
Treasury Stock, Common, Shares (in shares)		474,981				474,981	0
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.4	$ 0.4	$ 0.4
Payments of Ordinary Dividends, Common Stock						$ 58	$ 58	$ 58
Treasury Stock, Shares, Retired (in shares)	13,477,933
Additional Paid-in Capital [Member]
Treasury Stock, Retired, Value	$ 216