Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Inventory	$ 1,092us-gaap_DeferredTaxAssetsInventory	$ 44us-gaap_DeferredTaxAssetsInventory
Investments in affiliates	2,233	242
Warranty	323chci_DeferredTaxAssetsWarranty	199chci_DeferredTaxAssetsWarranty
Net operating loss and tax credit carryforwards	47,967	46,191
Accrued expenses	92	159
Stock based compensation	457	494
Deferred tax assets gross	52,164us-gaap_DeferredTaxAssetsGross	47,329us-gaap_DeferredTaxAssetsGross
Less - valuation allowance	(52,135)	(47,330)
Net deferred tax assets	29us-gaap_DeferredTaxAssetsNet	(1)us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Depreciation and amortization	(29)	1
Net deferred tax liabilities	(29)us-gaap_DeferredTaxLiabilities	1us-gaap_DeferredTaxLiabilities
Net deferred tax assets (liabilities)	$ 0us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 0us-gaap_DeferredTaxAssetsLiabilitiesNet

Deferred tax assets warranty.

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Deferred tax liabilities depreciation and amortization.

+ References

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

+ References

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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

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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 temporary differences from reserves and accruals.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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

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Amount of deferred tax liability attributable to taxable temporary differences from investments in unconsolidated subsidiaries and investments in other affiliates which are not controlled nor consolidated.

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