Income taxes disclosure.

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Amount of operating loss carryforward expiration in two thousand thirty six.

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Amount of operating loss carryforward indefinitely.

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percentage of net operating loss carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

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A description of the limitations on the use of all operating loss carryforwards available to reduce future taxable income.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Expiration date of the tax credit carryforward, in CCYY-MM-DD format.

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Amount of income tax expense (benefit) for remeasurement of deferred tax from change in tax rate pursuant to Tax Cuts and Jobs Act.

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Amount of unrecognized tax benefits.

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Income Taxes - Additional Information (Details) - USD ($)		12 Months Ended
	Dec. 22, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes Disclosure [Line Items]
Federal statutory income tax rate, percent			21.00%	34.00%
Percentage of net operating loss carryforwards			80.00%
Tax cuts and jobs act of 2017 change in tax rate income tax expense benefit	$ 0
Valuation allowance		$ 40,221,000	$ 15,395,000
Operating loss carryforwards, limitations on use		$14.0 million will begin to expire in 2036 and $113.0 million can be carried forward indefinitely.
Operating loss carryforward expiration in two thousand thirty six		$ 14,000,000
Operating loss carryforward indefinitely		113,000,000
Uncertain tax positions		0
Penalties and interest accrued		0
Federal
Income Taxes Disclosure [Line Items]
Operating loss carryforwards		$ 127,000,000
Operating loss carryforwards, expiration date		Dec. 31, 2036
Federal \| Research Credits
Income Taxes Disclosure [Line Items]
Tax credit carryforward, amount		$ 3,800,000	900,000
Tax credit carryforward, expiration date		Dec. 31, 2037
State
Income Taxes Disclosure [Line Items]
Operating loss carryforwards		$ 130,800,000
Operating loss carryforwards, expiration date		Dec. 31, 2036
State \| Research Credits
Income Taxes Disclosure [Line Items]
Tax credit carryforward, amount		$ 500,000	$ 200,000
Tax credit carryforward, expiration date		Dec. 31, 2032