Note 11 - Weighted Average Assumptions, Restricted Stock Units (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Performance Based Restricted Stock Units [Member]
Risk-free interest rate	1.02%		0.81%		0.52%
Average closing price	$ 8.96	[1]	$ 11.28	[2]	$ 11.33	[3]
Expected volatility	38.40%		44.50%		53.60%
Dividend yield	0.00%		0.00%		0.00%
Dividend yield	0.00%

[1] Average closing price of our shares over the 30 calendar days ending May 19, 2015.

[2] Average closing price of our shares over the 30 calendar days ending May 16, 2014.

[3] Average closing price of our shares over the 30 calendar days ending June 3, 2013.