Series B Convertible Preferred Stock and Stockholders' Equity (Details)			1 Months Ended	3 Months Ended		5 Months Ended	9 Months Ended		12 Months Ended
	Jun. 13, 2020 $ / shares	Jul. 31, 2015 director shares	Jul. 27, 2020 shares	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($)	Dec. 31, 2020 USD ($) shares	Sep. 30, 2020 USD ($) vote $ / shares shares	Sep. 30, 2019 USD ($)	Dec. 31, 2015 shares	Jun. 25, 2020 shares	Dec. 31, 2019 USD ($) $ / shares shares	Feb. 28, 2014 shares
Class of Warrant or Right [Line Items]
Authorized common stock (in shares)				400,000,000			400,000,000				400,000,000
Par value of common stock (in dollars per share) | $ / shares				$ 0.0001			$ 0.0001				$ 0.0001
Number of votes entitled by holders of common stock for each share of common stock | vote							1
Common stock, shares outstanding (in shares)				52,393,579			52,393,579				51,178,146
Number of shares issuable upon exercise of warrants (in shares)				15,983,072			15,983,072
Exercise price (in dollars per share) | $ / shares				$ 11.50			$ 11.50
Number of warrants outstanding (in shares)				15,983,072			15,983,072
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.0001			$ 0.0001				$ 0.0001
Rohm and Haas
Class of Warrant or Right [Line Items]
Number of shares of Series A Preferred Stock issued as condition to consummation of business combination (in shares)		1
Number of directors preferred stockholder is entitled to appoint if minimum ownership percentage of common stock is maintained | director		1
Minimum percentage of outstanding shares of voting and non-voting common stock to be held to entitle preferred stockholder to appoint director		10.00%
Series B Convertible Stock
Class of Warrant or Right [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.0001			$ 0.0001				$ 0.0001
Dividends | $				$ 4,400,000	$ 0		$ 4,400,000	$ 0
Accrued dividends | $				$ 0			$ 0				$ 0
Preferred stock, convertible, conversion price (in dollars per share) | $ / shares	$ 5.00
Series B Convertible Stock | Maximum
Class of Warrant or Right [Line Items]
Preferred stock issued (in shares)				30,440,000			30,440,000				0
Series B Convertible Stock | Paid In-Kind
Class of Warrant or Right [Line Items]
Dividends | $				$ 2,200,000			$ 2,200,000
Series B Convertible Stock | Cash
Class of Warrant or Right [Line Items]
Dividends | $				$ 2,200,000			$ 2,200,000
Public warrants
Class of Warrant or Right [Line Items]
Number of warrants outstanding (in shares)												9,823,072
Number of warrants repurchased (in shares)									1,201,928
Private placement warrants
Class of Warrant or Right [Line Items]
Number of warrants outstanding (in shares)												6,160,000
Dividend rate increase	2.00%
Private placement warrants | Dividends Within First Anniversary
Class of Warrant or Right [Line Items]
Percentage payable in cash	50.00%
Percentage payable in kind	50.00%
Private placement warrants | Dividends After First Anniversary
Class of Warrant or Right [Line Items]
Percentage payable in cash	50.00%
Percentage payable in kind	37.50%
Percentage payable in cash or kind	12.50%
Private placement warrants | Convertible Preferred Stock | Forecast
Class of Warrant or Right [Line Items]
Sale of stock, consideration received on transaction | $						$ 150,000,000
Private placement warrants | Series B Convertible Stock
Class of Warrant or Right [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.0001
Liquidation preference (in dollars per share) | $ / shares	1,000
Private placement warrants | Series B Convertible Stock | Forecast
Class of Warrant or Right [Line Items]
Preferred stock issued (in shares)						150,000
Convertible preferred stock, shares issued upon conversion (in shares)						150,000
Cumulative dividend rate						16.00%
Private placement warrants | Series B-1 Convertible Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock issued (in shares)			150,000
Preferred stock, par value (in dollars per share) | $ / shares	0.0001
Liquidation preference (in dollars per share) | $ / shares	1,000
Private placement warrants | Series B-1 Convertible Preferred Stock | Forecast
Class of Warrant or Right [Line Items]
Cumulative dividend rate						16.00%
Private placement warrants | Series B-2 Convertible Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.0001
ATM Facility
Class of Warrant or Right [Line Items]
Authorized common stock (in shares)										30,000,000