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Cash, Cash Equivalents and Marketable Securities | 6 Months Ended
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Jun. 30, 2017
Cash, Cash Equivalents and Marketable Securities |
6. | Cash, Cash Equivalents and Marketable Securities
At June 30, 2017 and December 31, 2016, the Company’s investments included money market funds and short-term marketable securities. These marketable securities are classified as available-for-sale. Marketable securities are investments with original maturities of greater than 90 days. Long-term marketable securities are securities with maturities of greater than one year. The average remaining contractual maturity of marketable securities at June 30, 2017 was approximately 2.0 months. Management reviewed the Company’s investments as of June 30, 2017 and December 31, 2016 and concluded that there are no securities with other than temporary impairments in the investment portfolio. The Company does not intend to sell any investments in an unrealized loss position, and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized cost bases. Investments in marketable securities consisted of the following at June 30, 2017 (in thousands):
|  | June 30, 2017 |
|  | Amortized Cost |  |  | Gross Unrealized Gain |  |  | Gross Unrealized Loss |  |  | Fair Value |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate and other debt securities |  | $ | 2,744 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,744 |
Total |  | $ | 2,744 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,744 |
There were no long-term marketable securities as of June 30, 2017. At June 30, 2017, the Company’s investments included two securities in unrealized loss positions with a total unrealized loss of less than $1,000 and a total fair market value of approximately $1,498,000. All investments with gross unrealized losses have been in unrealized loss positions for less than 12 months. The unrealized losses were caused primarily by current economic and market conditions. There was no change in the credit risk of the securities. There were no realized gains or losses on the investments for the three- and six-month periods ended June 30, 2017 and 2016. Investments in marketable securities consisted of the following at December 31, 2016 (in thousands):
|  | December 31, 2016 |
|  | Amortized Cost |  |  | Gross Unrealized Gain |  |  | Gross Unrealized Loss |  |  | Fair Value |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government and agency securities |  | $ | 807 |  |  | $ | — |  |  | $ | — |  |  | $ | 807 |
Corporate and other debt securities |  |  | 18,745 |  |  |  | 2 |  |  |  | (7 | ) |  |  | 18,740 |
Total |  | $ | 19,552 |  |  | $ | 2 |  |  | $ | (7 | ) |  | $ | 19,547 |
There were no long-term marketable securities as of December 31, 2016. The contractual maturities of all money market funds and marketable securities are less than one year as of June 30, 2017.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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