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Equity - Schedule of Authorized Shares of Common Stock for Future Issuance (Details) - shares | Jun. 30, 2020 | Dec. 31, 2019
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Class of Stock [Line Items] |  |
Total (in shares) | 27,757,227 | 40,169,185
Shares available for future stock incentive awards |  |
Class of Stock [Line Items] |  |
Total (in shares) | 5,283,139 | 1,765,018
Unvested restricted stock units |  |
Class of Stock [Line Items] |  |
Total (in shares) | 159,375 | 181,250
Outstanding common stock options |  |
Class of Stock [Line Items] |  |
Total (in shares) | 7,473,613 | 6,796,669
Warrant |  |
Class of Stock [Line Items] |  |
Total (in shares) | 14,841,100 | 31,426,248

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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