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Cash and Cash Equivalents, Short-term Investments and Fair Value of Financial Instruments | 12 Months Ended
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Dec. 31, 2013
Cash and Cash Equivalents [Abstract] |
Cash and Cash Equivalents, Short-term Investments and Fair Value of Financial Instruments | Cash and Cash Equivalents and Fair Value of Financial Instruments Cash and cash equivalents consist of the following significant investment asset classes, with disclosure of amortized cost, gross unrealized gains and losses, and fair value as of December 31, 2013 and December 31, 2012 (in thousands):
| December 31, 2013 |  |
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value |  | Cash / Cash Equivalents |  |  | Security Classification
Cash | $ | 38,823 |  |  | $ | — |  |  | $ | — |  |  | $ | 38,823 |  |  | $ | 38,823 |  |  |  | N/A
Money market funds | 65,708 |  |  | — |  |  | — |  |  | 65,708 |  |  | 65,708 |  |  |  | Available for sale
Total cash and cash equivalents | $ | 104,531 |  |  | $ | — |  |  | $ | — |  |  | $ | 104,531 |  |  | $ | 104,531 |  |  |  |
| December 31, 2012 |  |
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value |  | Cash / Cash Equivalents |  |  | Security Classification
Cash | $ | 23,422 |  |  | $ | — |  |  | $ | — |  |  | $ | 23,422 |  |  | $ | 23,422 |  |  |  | N/A
Money market funds | 38,892 |  |  | — |  |  | 1 |  |  | 38,891 |  |  | 38,891 |  |  |  | Available for sale
Total cash and cash equivalents | $ | 62,314 |  |  | $ | — |  |  | $ | 1 |  |  | $ | 62,313 |  |  | $ | 62,313 |  |  |  |
The money market fund is a daily-traded cash equivalent with a price of $1.00, making it a Level 1 asset class, and its carrying cost closely approximates fair value. As demand deposit (cash) balances vary with the timing of collections and payments, the money market fund can cover any surplus or deficit, and thus is considered Available-for-sale. The following table displays the financial assets measured at fair value, on a recurring basis, with money market funds recorded within cash and cash equivalents (in thousands):
| Quoted Prices in Active Markets for Identical Instruments (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total Fair Value
At December 31, 2013 | $ | — |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 65,708 |  |  | $ | — |  |  | $ | — |  |  | $ | 65,708 |
Total | $ | 65,708 |  |  | $ | — |  |  | $ | — |  |  | $ | 65,708 |
At December 31, 2012 |  |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 38,891 |  |  | $ | — |  |  | $ | — |  |  | $ | 38,891 |
Total | $ | 38,891 |  |  | $ | — |  |  | $ | — |  |  | $ | 38,891 |
Current assets and current liabilities are recorded at amortized cost, which approximates fair value due to the short-term maturities implied.

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- Definition The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4273-108586 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 6.H.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13728-122682 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section H -Subsection 3 + Details
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