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Short-Term Investments	6 Months Ended
Short-Term Investments	Jun. 30, 2020
Short-Term Investments
Short-Term Investments	4. Short-Term Investments Short-term investments consist of equity securities with a maturity of greater than three months when acquired. The Company holds its securities at fair value as of June 30, 2020 and December 31, 2019. Unrealized gains and losses on securities are reported in the statement of operations and comprehensive loss. Short-term investments at June 30, 2020 and December 31, 2019 consisted of mutual funds with fair values of $26.3 million and $5.7 million, respectively.