Income Taxes - Tax Effect of Each Type of Temporary Difference and Carry Forward that Gives Rise to Deferred Tax Asset (Detail) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Total deferreds:
Allowance for doubtful accounts	$ 117	$ 68
Accrued compensation	870	731
AMT credit	29	58
Total book to tax difference in partnership	(103)	(193)
Net operating loss	4,741	2,654
Valuation allowance	(5,625)	(3,260)
Net deferred tax asset	$ 29	$ 58

Deferred Tax Liability Fixed Asset Basis Difference

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

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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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