Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Income Tax Expense (Benefit)	$ 0	$ 0
Tax benefits attributable to NOL	2,500,000
Tax benefits attributable to tax credit caryforwards	75,000
Deferred tax assets, valuation allowance	$ 2,208,843	$ 35,041,300
Federal tax provision (benefit) rate	21.00%	21.00%
Federal Tax Authority
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	2020
Net operating loss carryforwards	$ 147,300,000
Tax credit carryforwards	$ 1,700,000
TaxCreditCarryforwardsExpirationBeginningYear	2020
NOLAndTaxCreditCarryforwardsEliminated	$ 143,300,000
NOLCarryforwardBeforeValuationAllowance	5,700,000
TaxCreditCarryforwardBeforeValuationAllowance	$ 0
State Tax Authority
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	2020
Net operating loss carryforwards	$ 50,900,000
Tax credit carryforwards	$ 900,000
TaxCreditCarryforwardsExpirationBeginningYear	2020
Minimum
Tax Credit Carryforward [Line Items]
Open Tax Year	2016