Note 8 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Year Ended December 31,
	2023			2022			2021
Stock-based compensation expense, gross	$	20		$	22		$	14
Income tax benefit at our statutory rate associated with stock-based compensation		(5	)		(6	)		(4	)
Stock-based compensation expense, net	$	15		$	16		$	10

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Year Ended December 31,
	2023					2022					2021
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
	Number			Grant Date		Number			Grant Date		Number			Grant Date
	of			Fair Value		of			Fair Value		of			Fair Value
	Shares			Per Share		Shares			Per Share		Shares			Per Share
Restricted stock - common:
Outstanding - beginning of period		997,745		$	20.62		1,035,728		$	19.69		917,533		$	16.84
Granted		1,007,919			8.15		400,927			21.68		731,374			19.73
Vested		(537,728	)		20.32		(438,910	)		19.38		(613,179	)		15.48
Outstanding - end of period		1,467,936		$	12.17		997,745		$	20.62		1,035,728		$	19.69
Restricted stock - Class A common:
Outstanding - beginning of period		677,238		$	19.36		720,421		$	18.22		480,042		$	16.10
Granted		738,854			8.34		250,448			20.52		488,918			18.66
Vested		(267,859	)		18.95		(293,631	)		17.55		(248,539	)		15.00
Outstanding - end of period		1,148,233		$	12.37		677,238		$	19.36		720,421		$	18.22
Restricted stock units - common:
Outstanding - beginning of period		274,145		$	23.60		125,247		$	19.02		90,184		$	18.92
Granted		587,168			11.50		259,079			23.87		95,115			19.05
Vested		(247,953	)		23.64		(108,921	)		19.03		(60,052	)		18.92
Forfeited		(26,192	)		23.15		(1,260	)		19.05		-			-
Outstanding - end of period		587,168		$	11.50		274,145		$	23.60		125,247		$	19.02