Note 7 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

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

	Three Months Ended March 31,
	2020			2019
Stock-based compensation expense, gross	$	4		$	2
Income tax benefit at our statutory rate associated with stock-based compensation		(1	)		(1	)
Stock-based compensation expense, net	$	3		$	1

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

	Three Months Ended March 31,
	2020					2019
				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		977,547		$	15.45		578,894		$	13.14
Granted (1)		248,543			21.69		677,602			15.72
Forfeited		(85,630	)		15.53		-			-
Vested		(260,004	)		14.20		(279,170	)		13.25
Outstanding - end of period		880,456		$	17.57		977,326		$	14.89
Restricted Class A common stock:
Outstanding - beginning of period		449,284		$	13.55		407,786		$	11.82
Granted (1)		166,814			19.87		199,810			15.36
Vested		(136,056	)		12.32		(158,312	)		11.38
Outstanding - end of period		480,042		$	16.10		449,284		$	13.55
Restricted stock units - common stock:
Outstanding - beginning of period		398,000		$	18.21		-		$	-
Granted		90,184			18.92		-			-
Vested		-			-		-			-
Outstanding - end of period		488,184		$	18.34		-		$	-