Note 6 - Goodwill and Intangibles - Changes in customer list intangible (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Balance at the beginning of period	$ 9,078,953	$ 7,381,213
Balance at the end of the period	17,450,182	$ 9,078,953
Customer Lists [Member]
Customer list intangible from acquisition of Bates Companies	1,854,932
Balance at the end of the period	$ 1,854,932