Note 12 - Stock Options Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Outstanding (in shares)	1,245,000	750,000
Outstanding (in dollars per share)	$ 3.69	$ 4.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	511,000	734,000
Granted (in dollars per share)	$ 1.24	$ 2.26
Forfeited (in shares)	(488,000)	(214,000)
Forfeited (in dollars per share)	$ 2.25	$ 2.13
Cancelled (in shares)	(24,000)	(25,000)
Cancelled (in dollars per share)	$ 5.18	$ 6.34
Outstanding (in shares)	962,000	1,245,000
Outstanding (in dollars per share)	$ 2.92	$ 3.69
Cancelled (in shares)	(243,000)
Expired (in dollars per share)	$ 0.93
Exercised (in shares)	(38,859)	(308)
Exercised (in dollars per share)	$ 1.12
Exercisable at December 31, 2015 (in shares)	425,000
Exercisable at December 31, 2015 (in dollars per share)	$ 4.91