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Financial Instruments and Marketable Securities | 3 Months Ended
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Mar. 31, 2014
Financial Instruments and Marketable Securities [Abstract] |
Financial Instruments and Marketable Securities | (2) Financial Instruments and 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 and how they are determined are defined in our 2013 annual report on Form 10-K in Note 1 of the Notes to Consolidated Financial Statements. The following table presents the placement in the fair value hierarchy of assets that are measured at fair value on a recurring basis:
March 31, 2014: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 453 |  |  | 453 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 453 |  |  | 453 |  |  | — |  |  | — |
December 31, 2013: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 451 |  |  | 451 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 451 |  |  | 451 |  |  | — |  |  | — |
March 31, 2013: | Total |  | Level 1 |  | Level 2 |  | Level 3
Common stock | $ | 417 |  |  | 417 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 417 |  |  | 417 |  |  | — |  |  | — |
There were no transfers between levels during the three month periods ended March 31, 2014 and 2013. As of March 31, 2014, December 31, 2013, and March 31, 2013, our financial assets that are measured at fair value on a recurring basis consisted of common stock. Marketable securities, all treated as available-for-sale securities, consist of the following:
March 31, 2014: | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Common stock | $ | 197 |  |  | 256 |  |  | — |  |  | 453 |
Total available-for-sale securities | $ | 197 |  |  | 256 |  |  | — |  |  | 453 |
December 31, 2013: | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Common stock | $ | 197 |  |  | 254 |  |  | — |  |  | 451 |
Total available-for-sale securities | $ | 197 |  |  | 254 |  |  | — |  |  | 451 |
March 31, 2013: | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Common stock | $ | 197 |  |  | 220 |  |  | — |  |  | 417 |
Total available-for-sale securities | $ | 197 |  |  | 220 |  |  | — |  |  | 417 |
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
March 31, 2014: | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Common stock | $ | 197 |  |  | 453 |  |  | — |  |  | — |
Total available-for-sale securities | $ | 197 |  |  | 453 |  |  | — |  |  | — |

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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 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: 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=27724398&loc=d3e27357-111563 Reference 3: 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 4: 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 5: 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=27724398&loc=d3e27232-111563 Reference 6: 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 7: 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=27724398&loc=d3e27161-111563 Reference 8: 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=27724398&loc=d3e27405-111563 Reference 9: 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 + Details
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