Note 11 - Employee Stock Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Stock Options					Stock and RSUs
	Shares			Weighted-average Exercise Price (per share)		Shares / Units			Weighted-average Grant Date Fair Value (per share)
Outstanding balance at December 31, 2018		590,572		$	16.82		692,929		$	7.66
Granted		150,000		$	9.25		848,803		$	3.37
Exercised or vested		—					(336,182	)	$	6.94
Forfeited or expired		(31,249	)	$	14.69		(98,713	)	$	5.13
Outstanding balance at December 31, 2019		709,323		$	15.31		1,106,837		$	4.82
Exercisable at December 31, 2019		438,915		$	17.94

Schedule of Share Based Payment Award, Award Expensing and Valuation Assumptions [Table Text Block]

Year ended December 31,
(dollars in thousands, except grant date fair values and assumptions)	2019			2018
Total stock compensation expense	$	3,231		$	2,827
Total fair value of stock, stock options and RSUs vested	$	2,808		$	3,371
Weighted average grant date fair value of stock options granted	$	0.80		Not applicable
Weighted average grant date fair value of stock and RSUs granted	$	3.37		$	5.50
Intrinsic value of stock options exercised		Not applicable		$	38
Intrinsic value of stock and RSUs vested	$	1,256		$	1,230
Weighted-average assumptions for stock option grants:
Risk-free interest		2.28	%	Not applicable
Expected term		6.5 years		Not applicable
Expected volatility		50.94	%	Not applicable
Dividend yield		0	%	Not applicable