Note 13 - Employee Equity Incentive Plans (Details) - Weighted Average Grant Date Fair Value Activity - $ / shares	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Weighted Average Grant Date Fair Value Activity [Abstract]
Stock options granted during the period	$ 0.0	$ 0.29	$ 0.29
Stock options vested during the period	0.24		0.15
Stock options forfeited during the period	$ 0		$ 0