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Income Taxes - Components of Net Deferred Tax Asset or Liability (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred Tax Assets    
Accruals, prepaid items and allowances $ 208us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals $ 86us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
Inventories 75us-gaap_DeferredTaxAssetsInventory 55us-gaap_DeferredTaxAssetsInventory
Current deferred tax assets 283us-gaap_DeferredTaxAssetsGrossCurrent 141us-gaap_DeferredTaxAssetsGrossCurrent
Property and equipment 1us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment 1us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Net operating loss carryforwards 1,925us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 1,297us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Long-term deferred tax assets 1,926us-gaap_DeferredTaxAssetsGrossNoncurrent 1,298us-gaap_DeferredTaxAssetsGrossNoncurrent
Total deferred tax assets 2,209us-gaap_DeferredTaxAssetsGross 1,439us-gaap_DeferredTaxAssetsGross
Less: Valuation allowance (1,506)us-gaap_DeferredTaxAssetsValuationAllowance (885)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred tax assets 703us-gaap_DeferredTaxAssetsNet 554us-gaap_DeferredTaxAssetsNet
Deferred Tax Liabilities    
Accruals, prepaid items and allowances (26)us-gaap_DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals (29)us-gaap_DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals
Other (59)us-gaap_DeferredTaxLiabilitiesOther (67)us-gaap_DeferredTaxLiabilitiesOther
Current deferred tax liabilities (85)us-gaap_DeferredTaxLiabilitiesGrossCurrent (96)us-gaap_DeferredTaxLiabilitiesGrossCurrent
Property and equipment (327)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (86)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Intangibles (783)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets (374)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
Investment in partnership (9,206)us-gaap_DeferredTaxLiabilitiesInvestments (9,554)us-gaap_DeferredTaxLiabilitiesInvestments
Long-term deferred tax liabilities (10,316)us-gaap_DeferredTaxLiabilitiesGrossNoncurrent (10,014)us-gaap_DeferredTaxLiabilitiesGrossNoncurrent
Total deferred tax liabilities (10,401)us-gaap_DeferredIncomeTaxLiabilities (10,110)us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax liabilities $ (9,698)us-gaap_DeferredTaxAssetsLiabilitiesNet $ (9,556)us-gaap_DeferredTaxAssetsLiabilitiesNet