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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract] |
Cash and Cash Equivalents | The following table summarizes the fair value of our cash and cash equivalents:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
December 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 1,398,928 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,398,928 |
Cash equivalents (money market accounts) |  |  | 23,588,675 |  |  |  | — |  |  |  | — |  |  |  | 23,588,675 |
Total cash, cash equivalents, and marketable securities |  | $ | 24,987,603 |  |  | $ | — |  |  | $ | — |  |  | $ | 24,987,603 |
December 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 1,355,281 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,355,281 |
Cash equivalents (money market accounts) |  |  | 29,230,143 |  |  |  | — |  |  |  | — |  |  |  | 29,230,143 |
Total cash, cash equivalents, and marketable securities |  | $ | 30,585,424 |  |  | $ | — |  |  | $ | — |  |  | $ | 30,585,424 |

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