Note 5 - Goodwill and Other Intangible Assets, Net - Summary of Intangible Assets (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Other intangibles, gross	$ 9,830,000	$ 5,510,000
Less: accumulated amortization	2,093,559	1,559,162
Intangible assets, net	7,736,441	3,950,838
Customer-Related Intangible Assets [Member]
Other intangibles, gross	7,700,000	4,970,000
Noncompete Agreements [Member]
Other intangibles, gross	200,000	200,000
Trademarks [Member]
Other intangibles, gross	$ 1,930,000	$ 340,000