Note 1 - Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cost incurred	$ 3,960,199	$ 2,066,982
Prepayments	(1,732,231)	(1,959,042)
Deferred Revenue	(876,286)	(98,781)
Allowance for doubtful accounts at the end of the period	1,351,682	9,159
Contract Assets	2,773,058	624,275
Contract Liabilities	(1,421,376)	(615,116)
	$ 1,351,682	$ 9,159