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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Effective tax rate	0.00%		0.00%	(0.59%)
Income tax (benefit)	$ 0	$ (445,000)	$ 0	$ (940,000)
Federal and state Net Operating Losses	160,000,000		$ 160,000,000
Year of expiration of net operating loss carryforward expiration year			2027
Accruals related to uncertainties tax positions	$ 0	$ 0	$ 0	$ 0
Tax year remain subject to examination			2015 2016 2017 2018

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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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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