Note 9 - Income Taxes - Components of Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Current:
Federal			$ 48,330	$ 758,297
State			3,500	11,580
Total Current Provision			51,830	769,877
Deferred:
Federal			56,888	488,038
State
Total deferred			56,888	488,038
Income tax expense	$ (139,052)	$ 573,783	$ 108,718	$ 1,257,915