Note 9 - Income Taxes - Components of Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Current:
Federal			$ 1,195,528	$ (71,070)
State			11,580	314
Total Current income tax provision/(benefit)			1,207,108	(70,756)
Deferred:
Federal			559,123	(836,616)
State
Total deferred income tax provision/(benefit)			559,123	(836,615)
Income tax expense/(benefit)	$ 508,316	$ (203,310)	$ 1,766,231	$ (907,372)