Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Estimated annual limit of loss carryforward	$ 1,000,000
Estimated total limit of loss carryforward	15,000,000
Net operating loss carryforwards	15,060,000
Net deferred tax asset	492,000	$ 458,000
Loss carryforwards, subject to expiration	$ 13,100,000
Operating loss carry forwards expiration year start	2025
Operating loss carry forwards expiration year end	2032
Liability for unrecognized tax benefits	$ 0	$ 0
Accrued for interest or penalties of unrecognized tax benefits	$ 0
Statutory federal income tax rate	21.00%	34.00%
Percentage limit of deduction on taxable income with no carrybacks and indefinite carryforwards	80.00%
Minimum
Income Tax Contingency [Line Items]
Percentage Of Life Reserve for tax purpose	92.81%