Note 13 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Year Ended December 31,
	2019					2018					2017
	Number of Shares			Weighted-Average Exercise Price per Share		Number of Shares			Weighted-Average Exercise Price per Share		Number of Shares			Weighted-Average Exercise Price per Share
Outstanding Stock Option Activity
Outstanding, beginning of period		821,470		$	11.00		826,498		$	11.00		835,786		$	11.00
Granted		249,283		$	5.76		—		$	—		—		$	—
Exercised		—		$	—		—		$	—		(9,288	)	$	11.00
Forfeited		(2,736	)	$	11.00		(5,028	)	$	11.00		—		$	—
Outstanding, end of period		1,068,017		$	9.78		821,470		$	11.00		826,498		$	11.00
Exercisable, end of period		818,734		$	11.00		821,470		$	11.00		826,498		$	11.00

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Year Ended December 31,
	2019					2018					2017
	Number of Shares			Weighted-Average Grant-Date Fair Value per Share		Number of Shares			Weighted-Average Grant-Date Fair Value per Share		Number of Shares			Weighted-Average Grant-Date Fair Value per Share
Restricted Stock Unit Activity
Outstanding, beginning of period		469,227		$	10.75		562,082		$	10.72		474,989		$	10.66
Granted		448,468		$	4.82		179,268		$	11.24		343,933		$	10.84
Vested		(277,401	)	$	10.50		(271,875	)	$	11.02		(211,475	)	$	10.76
Forfeited		(48,178	)	$	10.91		(248	)	$	10.05		(45,365	)	$	10.79
Outstanding, end of period		592,116		$	6.36		469,227		$	10.75		562,082		$	10.72

Share-based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block]

	Years Ended December 31,
	2019					2018
	Number of Shares			Weighted-Average Grant-Date Fair Value per Share		Number of Shares		Weighted-Average Grant-Date Fair Value per Share
Performance Share Unit Activity
Outstanding, beginning of period		125,422		$	11.68		—	$	—
Granted (at target)		—		$	—		125,422	$	11.68
Vested		—		$	—		—	$	—
Forfeited		(125,422	)	$	11.68		—	$	—
Outstanding, end of period (at target)		—		$	—		125,422	$	11.68

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

	Year Ended December 31,
	2019		2018		2017
	(Dollars in thousands)
Expense related to:
Stock options	$	174	$	—	$	11
Restricted stock units and performance share units		2,086		3,090		2,792
	$	2,260	$	3,090	$	2,803

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended December 31,
	2019			2018		2017
Expected term (in years)		6.0			—		—
Expected volatility		39.9	%		—		—
Risk-free interest rate		2.5	%		—		—
Expected dividends		—			—		—
Weighted-average grant date fair value per share	$	2.43		$	—	$	—

	Period Ended January 30,
	2017
Expected term (in years)		1.0
Expected volatility		34.9	%
Risk-free interest rate		0.8	%
Expected dividends		—
Re-measurement date fair value per share	$	1.32