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Equity - Narrative (Details) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 02, 2020 USD ($) day director $ / shares | Jun. 30, 2021 USD ($) $ / shares shares | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) $ / shares shares | Jun. 30, 2020 USD ($) | Dec. 31, 2020 $ / shares
Dividends Payable [Line Items] |  |  |  |  |  |
Series B convertible preferred stock par value (in dollars per share) | $ / shares |  | $ 0.001 |  | $ 0.001 |  | $ 0.001
Deemed dividends |  | $ (464,000) |  | $ (926,000) |  |
Series B Preferred convertible Stock, dividends accrued but not recorded for the period |  | 1,033,000 | $ 0 | 2,039,000 | $ 0 |
Total unrecognized compensation expense |  | 33,000,000.0 |  | $ 33,000,000.0 |  |
Outstanding Options, weighted average remaining contractual term (in years) |  |  |  | 2 years 4 months 28 days |  |
Preferred Class B Convertible Stock |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |
Issuance of Series B Preferred Stock | $ 100,000,000 |  |  |  |  |
Series B convertible preferred stock par value (in dollars per share) | $ / shares | $ 0.001 |  |  |  |  |
Proceeds from issuance of temporary equity | $ 100,000,000 |  |  |  |  |
Series B preferred stock, conversion price (in dollars per share) | $ / shares | $ 3.85 |  |  |  |  |
Conversion ratio of Series B preferred stock to common stock | 259.74 |  |  |  |  |
Series B preferred stock, minimum percentage of conversion stock price to trigger conversion (percent) | 200.00% |  |  |  |  |
Number of trading days within consecutive day trading period common stock must exceed trigger conversion price | day | 20 |  |  |  |  |
Series B preferred stock, threshold number of consecutive trading days | day | 30 |  |  |  |  |
Series B preferred stock, minimum percentage of conversion stock price on conversion date (percent) | 200.00% |  |  |  |  |
Number of board seats elected by Series B preferred stockholders | director | 2 |  |  |  |  |
Series B preferred stock, maximum voting stock percentage on an as-converted basis (percent) | 19.90% |  |  |  |  |
Series B preferred stock, increasing-rate dividend feature | $ 1,800,000 |  |  |  |  |
Preferred Class B Convertible Stock | Discounted Dividend Rate prior to Quarterly Dividend Payment ending on June 30,2021 |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |
Series B convertible stock, cumulative dividend (percent) | 4.00% |  |  |  |  |
Preferred Class B Convertible Stock | Perpetual Dividend Rate after Quarterly Dividend Payment ending on June 30, 2021 |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |
Series B convertible stock, cumulative dividend (percent) | 6.00% |  |  |  |  |
Series B Convertible Preferred Stock |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |
Deemed dividends |  | $ (464,000) |  | $ (926,000) |  |
Series B Preferred convertible Stock, dividends accrued but not recorded for the period |  |  |  | $ 4,100,000 |  |
Series B Preferred convertible stock, shares issuable upon conversion (in shares) | shares |  | 27,027,252 |  | 27,027,252 |  |

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