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Stockholders' Equity - Schedule of Warrants Outstanding (Details) - $ / shares shares in Thousands | Dec. 31, 2020 | Apr. 21, 2020 | Oct. 31, 2018
--- | --- | --- | ---
Class Of Warrant Or Right [Line Items] |  |  |
Exercise Price |  | $ 2.40 | $ 6.00
Common Stock Warrant One |  |  |
Class Of Warrant Or Right [Line Items] |  |  |
Number of Shares | 33 |  |
Exercise Price | $ 47.00 |  |
Expiration | Jan. 31, 2023 |  |
Common Stock Warrant Two |  |  |
Class Of Warrant Or Right [Line Items] |  |  |
Number of Shares | 1,846 |  |
Exercise Price | $ 2.40 |  |
Expiration | Oct. 31, 2023 |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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- Definition Expiration date of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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