Note 8 - Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	Year Ended December 31,
	2015
Expected volatility	52.3%
Expected dividends	None
Exercise price	$7.93	-	$27.12
Expected term (in years)	0.3	-	4.3
Risk-free rate	0.03%	-	1.3%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
	(in thousands)					(in years)		(in thousands)
Outstanding at January 1, 2014		5,283		$	11.69		6.36	$	65,351
Granted		—			—		—		—
Exercised		(159	)		5.23		—		—
Forfeited		(57	)		29.00		—		—
Outstanding at December 31, 2014		5,067		$	11.70		5.40	$	21,395
Granted		267			10.49		—		—
Exercised		(154	)		2.94		—		—
Forfeited		(61	)		19.03		—		—
Outstanding at December 31, 2015		5,119		$	11.82		4.41	$	2,874
Granted		—			—		—		—
Exercised		—			—		—		—
Forfeited		(703	)		3.19		—		—
Outstanding at December 31, 2016		4,416		$	13.18		3.86	$	—
Exercisable at December 31, 2016		4,416		$	13.18		3.86	$	—

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Shares			Weighted Average Grant-Date Fair Value
	(in thousands)
Non-vested at January 1, 2016		3,271		$	15.70
Forfeited		(576	)		15.30
Vested		(1,797	)		15.92
Non-vested at December 31, 2016		898		$	15.34