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Financial Instruments And Marketable Securities | 12 Months Ended
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Dec. 31, 2012
Financial Instruments And Marketable Securities [Abstract] |
Financial Instruments and Marketable Securities | Note 2. Financial Instruments and Marketable Securities We follow a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1) and the lowest priority to measurements involving significant unobservable inputs (Level 3). The three levels of the fair value hierarchy are as follows:
• | Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities.
• | Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, included in Level 1 that are observable either directly or indirectly.
• | Level 3 inputs are unobservable for the asset or liability, but are based upon our own assumptions used to measure assets and liabilities at fair value.
The level in the fair value hierarchy within which a fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The following table presents the placement in the fair value hierarchy of assets that are measured at fair value on a recurring basis:
December 31, 2012: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 354 |  |  | 354 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 354 |  |  | 354 |  |  | — |  |  | — |
December 31, 2011: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 320 |  |  | 320 |  |  | — |  |  | — |
Government and agency securities | 26,845 |  |  | 26,845 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 27,165 |  |  | 27,165 |  |  | — |  |  | — |
There were no transfers between levels during 2012 and 2011. As of December 31, 2012, our financial assets that are measured at fair value on a recurring basis include only common stock. Marketable securities, all treated as available-for-sale securities, consist of the following:
December 31, 2012: | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value
Common stock | $ | 197 |  |  | 157 |  |  | — |  |  | 354 |
Total available-for-sale securities | $ | 197 |  |  | 157 |  |  | — |  |  | 354 |
December 31, 2011: | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value
Common stock | $ | 197 |  |  | 123 |  |  | — |  |  | 320 |
Government and agency securities | 26,851 |  |  | — |  |  | (6 | ) |  | 26,845 |
Total available-for-sale securities | $ | 27,048 |  |  | 123 |  |  | (6 | ) |  | 27,165 |
The unrealized gains and losses recorded in accumulated other comprehensive income and the realized gains and losses recorded in earnings were immaterial during the three years reported in these consolidated financial statements. Future maturities of our available-for-sale securities consist of the following:
| Less than 12 months |  | Greater than 12 months
December 31, 2012: | Amortized cost |  | Fair value |  | Amortized cost |  | Fair value
Common stock | $ | 197 |  |  | 354 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 197 |  |  | 354 |  |  | — |  |  | — |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 3, 19, 20, 21, 22, 137 -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 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
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