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Merger and Financing - Pre-Merger Financing (Details) - USD ($) shares in Millions, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 04, 2019 | Jun. 30, 2019 | Dec. 31, 2019
Reverse Merger and Financing |  |  |
Percentage of volume-weighted average trading price of a share of common stock that triggered release of converted additional shares (in percentage) | 80.00% |  |
Period over which trading price of common stock as quoted on the Nasdaq Capital Market was considered for the release of converted additional shares | 3 days |  |
Senior Secured Convertible Notes |  |  |
Reverse Merger and Financing |  |  |
Repayment of senior secured notes |  |  | $ 5.3
Series A and Series C warrants |  |  |
Reverse Merger and Financing |  |  |
Equity issuance cost |  |  | 1.1
Series B Warrants |  |  |
Reverse Merger and Financing |  |  |
Equity issuance cost |  |  | 0.8
Financing SPA |  |  |
Reverse Merger and Financing |  |  |
Number of shares agreed to issue immediately prior to the merger (in shares) |  | 4.6 |
Number of converted initial shares, agreed to be issued (in shares) |  | 2.2 |
Number of converted additional shares in the form of escrow agreed to issue immediately prior to the merger (in shares) |  | 2.2 |
Aggregate purchase price |  | $ 25.0 |
Acquisition cost incurred |  | 2.5 |
Equity issuance cost |  |  | 1.9
Equity issuance costs paid in cash |  |  | 0.7
Equity issuance costs paid with equity |  |  | $ 1.2
Net proceeds from pre-merger financing |  | $ 17.2 |

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- Definition The percentage of the volume-weighted average trading price of a share of common stock as quoted on the Nasdaq Capital Market for the first three trading days immediately following the closing date of the Pre-Merger Financing as threshold to release converted additional shares. + References No definition available. + Details
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- Definition The period over which the percentage of the volume-weighted average trading price of a share of common stock as quoted on the Nasdaq Capital Market to release converted additional shares is determined, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of converted common shares, which the investors have right to receive pursuant to the exchange rate in the Merger, as agreed to be deposited in escrow by the accounting acquirer. + References No definition available. + Details
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