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Significant Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Deferred tax assets |  |
Losses & IRC Section 163(j) carryforwards | $ 16,218 | $ 24,372
Compensation related deductions | 2,725 | 4,737
Tax credits | 3,817 | 5,101
Restructuring related liabilities | 406 | 510
Inventory | 5,680 | 6,493
Depreciation | 938 | 194
Amortization | 163 |
Warranty | 1,007 | 680
Other | 854 | 598
Total deferred tax assets | 31,808 | 42,685
Valuation allowance for deferred tax assets | (11,534) | (15,481)
Net deferred income tax assets | 20,274 | 27,204
Deferred tax liabilities |  |
Equity investment | (1,025) | (807)
Depreciation | (471) |
Amortization | (11,283) | (14,254)
Unrealized gain/loss | (985) | (1,132)
Other | (581) | (201)
Total deferred tax liabilities | (14,345) | (16,394)
Net deferred income tax assets (liabilities) | $ 5,929 | $ 10,810

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