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Merger with Mirna Therapeutics (Tables) | 12 Months Ended
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Dec. 31, 2018
Business Combinations [Abstract] |
Net Assets Acquired in the Merger | The following table shows the net assets acquired in the Merger (in thousands):
|  | August 28, 2017 |
Cash and cash equivalents |  | $ | 14,882 |
Marketable securities |  |  | 27,600 |
Interest receivable |  |  | 126 |
Prepaid assets |  |  | 112 |
Unrealized loss on marketable securities |  |  | 5 |
Accounts payable and accrued expenses |  |  | (105 | )
Total net assets acquired |  |  | 42,620 |
Less: Transaction costs |  |  | (2,187 | )
Total net assets acquired less transaction costs |  | $ | 40,433 |

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