Note 5 - Reinsurance (Details Textual)	9 Months Ended
	Sep. 30, 2020 USD ($)
Casualty Business [Member]
Reinsurance Maximum Individual Risk	$ 1,000,000
Property [Member]
Reinsurance Maximum Individual Risk	500,000
Workers' Compensation [Member]
Reinsurance Maximum Individual Risk	$ 500,000