Note I - Equity-based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	Three months ended June 3 0 ,
	2018	2017
Volatility	45.08%	34.96%
Risk-free interest rate	2.93%	2.14%
Dividend yield	0%	0%
Pre-vest cancellation rate	3.65%	4.31%
Post-vest cancellation rate	3.21%	3.37%
Suboptimal exercise factor	1.205	1.117

Share-based Compensation, Activity [Table Text Block]

	Number of Options/SARs/RSUs			Weighted average exercise price		Weighted average remaining contractual term (years) (3)		Aggregate value (*)
	in thousands							in thousands
Outstanding at March 31, 2018		2,211		$	4.39		4.87	$	16,502
Options granted		6			11.75
SARs Granted		13			12.50
RSUs granted		9			-
Options / SARs / RSUs cancelled/forfeited/expired		(15	)		3.77
Options / SARs exercised and RSUs vested		(117	)	$	2.56
Outstanding at June 30, 2018 (1)		2,107		$	4.55		4.68	$	16,694
Exercisable at June 30, 2018 (2)		801		$	8.78		4.17	$	2,964

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

	Exercisable				Unexercisable				Total
Exercise prices	Number of Options/ SARs / RSUs (in thousands)		Weighted average exercise price		Number of Options/ SARs / RSUs (in thousands)		Weighted average exercise price		Number of Options/ SARs / RSUs (in thousands)		Weighted average exercise price
Less than $12.45		753	$	8.51		1,245	$	1.43		1,998	$	4.10
Above $12.45		48	$	13.05		61	$	12.50		109	$	12.74
Total		801	$	8.78		1,306	$	1.94		2,107	$	4.54