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Intangible Assets (Schedule of Fair Value of Combined Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2011 | Dec. 31, 2011 | Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2011
Intangible Assets [Line Items] |  |  |  |  |
Pre-impairment Carrying Value at December 31, 2011 | $ 19,426 | $ 19,426 |  | $ 19,426 |
Impairment Charge | 14,800 | (14,830) | 14,830 | 14,800 |
Post-impairment Carrying Value at December 31, 2011 | 4,596 | 4,596 | 4,226 | 4,596 | 21,564
Durasert |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Pre-impairment Carrying Value at December 31, 2011 | 6,318 | 6,318 |  | 6,318 |
Impairment Charge |  | (3,141) |  |  |
Post-impairment Carrying Value at December 31, 2011 | 3,177 | 3,177 |  | 3,177 |
BioSilicon |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Pre-impairment Carrying Value at December 31, 2011 | 13,108 | 13,108 |  | 13,108 |
Impairment Charge |  | (11,689) |  |  |
Post-impairment Carrying Value at December 31, 2011 | $ 1,419 | $ 1,419 |  | $ 1,419 |

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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 46 -Subparagraph b -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. + Details
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