Note 9 - Income Taxes - Effective Income Tax Rate Reconcilliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income tax benefit at federal statutory rate [34%]			$ (620,882)	$ 1,204,274
Change in other accruals			(13,537)	32,217
Difference between tax and book depreciation			50,213	(24,312)
Stock-based compensation			(48,993)	(39,234)
Research and development credits			(203,103)	(973,649)
Domestic production activities deduction				(109,989)
Net operating loss carryforward				954,581
Tax carryback				(511,158)
Provision for tax return true up			(71,070)	195,029
Income tax expense/(benefit)	$ (203,310)	$ 43,550	$ (907,372)	$ 727,759