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Note 8 - Investments, Including Investments Accounted for Using the Equity Method - Summarized Financial Data (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue	$ 11,492,564	$ 10,139,561	$ 22,902,744	$ 19,250,286
Gross profit	6,472,058	5,943,688	13,352,399	11,057,294
Net income	3,435,451	(2,096,790)	(21,292,246)	(6,186,268)
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Revenue	196,181,780	191,717,919	387,933,239	310,992,001
Gross profit	28,973,220	33,805,394	54,761,208	55,604,003
Income from continuing operations	10,545,792	11,949,522	17,927,828	15,487,002
Net income	$ 11,214,670	$ 10,667,777	$ 17,732,418	$ 14,016,284

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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