Note 10 - Summary of the Status and Changes of the Options Granted Under the Stock Option Plans and Other Agreements (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Outstanding at beginning of period (in shares)	17,053,116
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 1.02
200,000 (in shares)	988,356
Issued (in dollars per share) | $ / shares	$ 0.65
Expired (in shares)	(175,000)
Expired (in dollars per share) | $ / shares	$ (0.69)
Outstanding at end of period (in shares)	17,866,472
Outstanding at end of period (in dollars per share) | $ / shares	$ 1