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Income Taxes - Components of Net Deferred Tax Asset or Liability (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred Tax Assets    
Accrued reserves and allowances $ 5,140 $ 4,245
Allowance for doubtful accounts 514 500
Inventories 437 335
Property and equipment 303  
Intangibles 5,615 4,937
Net operating loss carryforwards 1,240 1,446
Other 5 4
Long-term deferred tax assets 13,254 11,467
Less: Valuation allowance (1,512) (1,255)
Net deferred tax assets 11,742 10,212
Deferred Tax Liabilities    
Accrued reserves and allowances (252) (365)
Property and equipment (4,176) (2,091)
Intangibles (4,307) (3,850)
Investment in partnership (11,857) (10,266)
Other (325) (242)
Long-term deferred tax liabilities (20,917) (16,814)
Net deferred tax liabilities $ (9,175) $ (6,602)