Note 8 - Stock Option Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2016
Outstanding (in shares)	760,000
Outstanding (in dollars per share)	$ 2.63
Outstanding (in dollars per share)	$ 1.09
Options granted (in shares)	90,000
Options granted (in dollars per share)	$ 1.83
Options granted (in dollars per share)	$ 0.43
Options cancelled or forfeited (in shares)	(90,000)
Outstanding (in shares)	760,000
Outstanding (in dollars per share)	$ 2.51
Outstanding (in dollars per share)	$ 1
Options Vested (in shares)	632,000
Exercisable at March 31, 2016 (in shares)	268,000