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Income Taxes - Reconciliation of Statutory and Effective Tax Rate After Adjustments for Non-Includable Partnership Income Arising from Non-Controlling Interest (Detail) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |
Federal statutory rate | (21.00%) | (21.00%)
State income taxes - net of federal benefit | (4.74%) | (4.74%)
Permanent differences | (0.44%) | (2.40%)
Return to provision adjustments | 0.42% | (4.29%)
Change in valuation allowance | 25.47% | 11.81%
Current state income tax | 0.00% | 0.00%
Change in enacted rate | 0.00% | 1.52%
Other, net | 0.00% | (2.44%)
Effective tax rate | (0.29%) | (21.54%)

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