Note 7 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	Three Months Ended March 31,
	2023			2022
Stock-based compensation expense, gross	$	2		$	5
Income tax benefit at our statutory rate associated with stock-based compensation		(1	)		(1	)
Stock-based compensation expense, net	$	1		$	4

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

	Three Months Ended March 31,
	2023					2022
				Weighted-					Weighted-
				Average					Average
	Number			Grant Date		Number			Grant Date
	of			Fair Value		of			Fair Value
	Shares			Per Share		Shares			Per Share
Restricted common stock:
Outstanding - beginning of period		997,745		$	20.62		1,035,728		$	19.69
Granted (1)		12,227			12.04		333,382			22.16
Vested		(257,355	)		20.21		(294,558	)		18.56
Outstanding - end of period		752,617		$	20.62		1,074,552		$	20.76
Restricted Class A common stock:
Outstanding - beginning of period		677,238		$	19.36		720,421		$	18.22
Granted (1)		25,022			13.30		250,448			20.52
Vested		(203,986	)		18.76		(229,758	)		16.99
Outstanding - end of period		498,274		$	19.30		741,111		$	19.38
Restricted stock units - common stock:
Outstanding - beginning of period		274,145		$	23.60		125,247		$	19.02
Granted		587,168			11.50		259,079			23.87
Vested		(247,953	)		23.64		(108,921	)		19.03
Forfeited		(26,192	)		23.15		(1,260	)		19.05
Outstanding - end of period		587,168		$	11.50		274,145		$	23.60