Note 2 - Investments - Summary of Proceeds from Investments and Related Gross Realized Gains and Losses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fixed Income Securities [Member]
Fixed maturity securities, proceeds	$ 3,428,951	$ 5,771,988	$ 12,813,180	$ 19,522,461
Fixed maturity securities, realized gains	67,102	99,445	412,577	264,737
Fixed maturity securities, realized losses		(10,183)	(926)	(26,332)
Fixed maturity securities, net realized gains (losses)	67,102	89,262	411,651	238,405
Common Stock [Member]
Equity securities, proceeds	986,939	1,320,803	4,247,936	5,998,276
Equity securities, realized gains	93,984	185,319	470,406	960,420
Equity securities, realized losses	(226,398)	(133,100)	(1,282,423)	(457,702)
Equity securities, net realized gains (losses)	(132,414)	$ 52,219	(812,017)	502,718
Preferred Stock [Member]
Equity securities, proceeds	76,500		221,990
Equity securities, realized gains	5,979		8,808
Equity securities, realized losses			(10,762)
Equity securities, net realized gains (losses)	$ 5,979		$ (1,954)