Note 7 - Income Tax - Provision for Income Tax (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Federal
Current									$ 1,182,914
Deferred									(36,695)
State
Current
Deferred
Change in valuation allowance									36,695
Income tax provision	$ 504,446	$ 394,468	$ 284,000						$ 1,182,914