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Marketable Securities | 9 Months Ended
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Sep. 30, 2013
Financial Instruments And Marketable Securities [Abstract] |
Marketable Securities | (2) Marketable Securities Due to the varying short-term cash needs of our business, we periodically have marketable securities. We value these assets utilizing 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 unobservable inputs (Level 3). The three levels of the fair value hierarchy are as follows:
• | Level 1 inputs are observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.
• | Level 2 inputs include other inputs that are directly or indirectly observable in the marketplace.
• | Level 3 inputs are unobservable inputs which are supported by little or no market activity.
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:
September 30, 2013: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 441 |  |  | 441 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 441 |  |  | 441 |  |  | — |  |  | — |
December 31, 2012: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 354 |  |  | 354 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 354 |  |  | 354 |  |  | — |  |  | — |
September 30, 2012: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 360 |  |  | 360 |  |  | — |  |  | — |
Government and agency securities | 26,868 |  |  | 26,868 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 27,228 |  |  | 27,228 |  |  | — |  |  | — |
There were no transfers between levels during the nine and three month periods ended September 30, 2013 and 2012. As of September 30, 2013, December 31, 2012, and September 30, 2012, our financial assets that are measured at fair value on a recurring basis consisted of common stock and, in the case of September 30, 2012, debt securities. Marketable securities, all treated as available-for-sale securities, consist of the following:
September 30, 2013: | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value
Common stock | $ | 197 |  |  | 244 |  |  | — |  |  | 441 |
Total available-for-sale securities | $ | 197 |  |  | 244 |  |  | — |  |  | 441 |
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 |
September 30, 2012: | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value
Common stock | $ | 197 |  |  | 163 |  |  | — |  |  | 360 |
Government and agency securities | 26,868 |  |  | — |  |  | — |  |  | 26,868 |
Total available-for-sale securities | $ | 27,065 |  |  | 163 |  |  | — |  |  | 27,228 |
The unrealized gains and losses recorded in accumulated other comprehensive income and the realized gains and losses recorded in earnings were immaterial during the periods 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
September 30, 2013: | Amortized cost |  | Fair value |  | Amortized cost |  | Fair value
Common stock | $ | 197 |  |  | 441 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 197 |  |  | 441 |  |  | — |  |  | — |

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