Note 13 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

	Year Ended December 31,
	2020					2019					2018
	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		1,068,017		$	9.78		821,470		$	11.00		826,498		$	11.00
Granted		161,479		$	5.36		249,283		$	5.76		—		$	—
Exercised		—		$	—		—		$	—		—		$	—
Forfeited		(8,801	)	$	11.00		(2,736	)	$	11.00		(5,028	)	$	11.00
Outstanding, end of period		1,220,695		$	9.18		1,068,017		$	9.78		821,470		$	11.00
Exercisable, end of period		893,028		$	10.51		818,734		$	11.00		821,470		$	11.00

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

	Year Ended December 31,
	2020					2019					2018
	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		592,116		$	6.36		469,227		$	10.75		562,082		$	10.72
Granted		358,869		$	4.78		448,468		$	4.82		179,268		$	11.24
Vested		(244,812	)	$	7.61		(277,401	)	$	10.50		(271,875	)	$	11.02
Forfeited		(1,283	)	$	11.68		(48,178	)	$	10.91		(248	)	$	10.05
Outstanding, end of period		704,890		$	5.11		592,116		$	6.36		469,227		$	10.75

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

	Years Ended December 31,
	2020				2019					2018
	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
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,
	2020		2019		2018
	(Dollars in thousands)
Expense related to:
Stock options	$	307	$	174	$	—
Restricted stock units and performance share units		1,890		2,086		3,090
	$	2,197	$	2,260	$	3,090

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

	Year Ended December 31,
	2020			2019			2018
Expected term (in years)		6.0			6.0			—
Expected volatility		41.8	%		39.9	%		—
Risk-free interest rate		1.4	%		2.5	%		—
Expected dividends		—			—			—
Weighted-average grant date fair value per share	$	2.24		$	2.43			—