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Significant Components of Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 137,700 | $ 137,800
Research and development credit carryforwards | 30,800 | 31,400
Capitalized inventory costs | 900 | 500
Inventory reserve | 700 | 200
Capitalized research and development | 9,100 | 10,300
Capitalized intangible asset | 100 | 0
Deferred compensation | 4,800 | 4,200
Accrued liabilities | 100 | 400
Depreciation | 1,300 | 1,400
Acqusition costs | 200 | 200
Deferred tenant allowance | 200 | 200
Capital loss carryforwards | 3,900 | 3,900
Total deferred tax assets | 190,500 | 191,300
Valuation allowance | (190,500) | (191,300)
Net deferred tax assets | 0 | 0
Deferred tax liabilities: |  |
Amortization of goodwill | 62 | 0
Total deferred tax liabilities | 62 | 0
Trademarks |  |
Deferred tax assets: |  |
Capitalized intangible asset | 400 | 200
Capitalized Revenue Sharing Rights |  |
Deferred tax assets: |  |
Capitalized intangible asset | $ 300 | $ 600

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 289 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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