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Fair-Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2013
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis | Our fair-value hierarchy for our financial assets and liabilities measured at fair value on a recurring basis are as follows:
| June 30, 2013
| Level 1 |  | Level 2 |  | Level 3 |  | Total
| (In thousands)
Assets: |  |  |  |  |  |  |
Money-market funds classified as cash equivalents | $ | 19 |  |  | $ | — |  |  | $ | — |  |  | $ | 19 |
Money-market funds classified as current restricted cash | 193 |  |  | — |  |  | — |  |  | 193 |
Money-market funds classified as non-current restricted cash | 679 |  |  | — |  |  | — |  |  | 679 |
Money-market funds classified as short-term investments | 18,346 |  |  | — |  |  | — |  |  | 18,346 |
Total | $ | 19,237 |  |  | $ | — |  |  | $ | — |  |  | $ | 19,237 |
| December 31, 2012
| Level 1 |  | Level 2 |  | Level 3 |  | Total
| (In thousands)
Assets: |  |  |  |  |  |  |
Money-market funds classified as cash equivalents | $ | 21 |  |  | $ | — |  |  | $ | — |  |  | $ | 21 |
Money-market funds classified as current restricted cash | 193 |  |  | — |  |  | — |  |  | 193 |
Money-market funds classified as non-current restricted cash | 679 |  |  | — |  |  | — |  |  | 679 |
Money-market funds classified as short-term investments | 20,830 |  |  | — |  |  | — |  |  | 20,830 |
Total | $ | 21,723 |  |  | $ | — |  |  | $ | — |  |  | $ | 21,723 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 -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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