Equity - Convertible Preferred Stock Series B (Details)		3 Months Ended	12 Months Ended
	Jul. 02, 2020 USD ($) day director $ / shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($)
Dividends Payable [Line Items]
Series B convertible preferred stock par value (in dollars per share) | $ / shares		$ 0.001	$ 0.001	$ 0.001
Proceeds from sale of Series B convertible preferred stock			$ 100,000,000	$ 0	$ 0
Amortization of beneficial conversion feature			31,110,000	0	0
Accretion of increasing-rate dividend feature			918,000	0	0
Series B Preferred convertible Stock, dividends accrued but not recorded for the period			2,016,000	$ 0	$ 0
Preferred Class B Convertible Stock
Dividends Payable [Line Items]
Series B convertible preferred stock par value (in dollars per share) | $ / shares	$ 0.001
Proceeds from sale of Series B convertible preferred stock	$ 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
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
Accretion of increasing-rate dividend feature			$ 900,000
Series B Preferred convertible Stock, dividends accrued but not recorded for the period		$ 2,000,000.0
Series B Preferred convertible stock, shares issuable upon conversion (shares) | shares		26,497,570	26,497,570
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%