Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
U.S. federal corporate tax rate	21.00%	21.00%	35.00%
Measurement period, description	The measurement period, as defined in SAB 118 for the Tax Act, begins on the enactment date of the Tax Act and ends when a company has obtained, prepared and analyzed the information that was needed in order to complete the accounting requirements under current accounting guidance. However, under no circumstances will the measurement period extend beyond one year from the enactment date of the Tax Act.
Increase in gross deferred tax assets for loss reserve discounting		$ 702,861
Increase in gross deferred tax liabilities for reserve transition liability		702,861
Operating loss carryforward expiration year	2031
Capital loss carryforward	$ 400,000
Capital loss carryforward expiration year	2023
Goodwill from asset purchases deductible for tax purposes	$ 6,000,000	6,000,000
Non-deductable goodwill	144,400,000	$ 144,400,000
Uncertain tax positions	0
Federal [Member]
Income Tax [Line Items]
Net operating loss carryforwards	450,000
State [Member]
Income Tax [Line Items]
Net operating loss carryforwards	$ 0