Notes and Securities Payable - Additional Information (Details) - USD ($)						3 Months Ended
	Jan. 07, 2021	Oct. 05, 2020	Dec. 27, 2018	Oct. 31, 2017	Mar. 21, 2017	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Sep. 30, 2020	Sep. 25, 2020	Oct. 30, 2017
Debt Instrument [Line Items]
Initial Obligation interest rate										8.00%
Amortization of debt issuance costs						$ 6,000	$ 34,000
Carrying value of the convertible securities								$ 76,500,000
Unamortized discount	$ 13,000,000.0
Capitalized debt issuance cost						100,000
Amortization of debt discount						13,700,000	5,700,000
Interest expense						1,175,000	$ 7,815,000
Current portion of notes and securities payable						$ 21,425,000		20,803,000
Seek Insurance Services, Inc. (Seek) [Member]
Debt Instrument [Line Items]
Effective interest rate						8.10%	0.00%
Convertible securities Maturity Date						Sep. 25, 2023
Interest expense						$ 400,000	$ 0
Date of purchase agreement						Sep. 25, 2020
Principal Borrowed						$ 20,000,000.0			$ 20,000,000.0
Current portion of notes and securities payable						$ 19,900,000		19,900,000
Debt instrument, term of coversion feature, description						The outstanding principal and accrued but unpaid interest will convert into an equity interest in Seek if prior to maturity, repayment or conversion of the note: (1) the note holder elects to convert the note, (2) upon the closing of Seek's next equity financing; or (3) upon consummation of an initial public offering of Seek's common stock or a SPAC or reverse merger transaction with Seek.
Merger Agreement With SCH Member
Debt Instrument [Line Items]
Business combination, effective date of merger						Jan. 07, 2021
Convertible Debt Securities [Member]
Debt Instrument [Line Items]
Carrying value of the convertible securities						$ 0
Interest expense							$ 6,500,000
Effective interest rate inclusive of amortization						100.00%	90.07%
Non Convertible Notes Payable [Member]
Debt Instrument [Line Items]
Aggregate principal amount from loan facility					$ 60,000,000.0
Amount drawn from loan facility					$ 40,000,000.0
Additional Amount Under Loan Facility				$ 20,000,000.0
Maturity Date of Initial Obligation				Mar. 01, 2022
Initial Obligation interest rate					11.00%						11.30%
Maturity Date Of Additional Obligation				Oct. 01, 2022
Amortization of debt issuance costs					$ 300,000
Carrying amount of the Loan Facility						$ 25,800,000		30,800,000
Interest Expense Debt						$ 800,000	$ 1,300,000
Effective interest rate						11.80%	11.80%
2015 Senior Secured Note [Member]
Debt Instrument [Line Items]
Proceeds to Pay Obligations and Working Capital					$ 30,000,000.0
Convertible Securities [Member]
Debt Instrument [Line Items]
Aggregate principal amount	74,600,000
Convertible securities Maturity Date			Apr. 01, 2023
Description of Embedded Derivative						The interest rate and embedded feature discount factor vary based on the length of time elapsed from the issue date of the securities. The interest rates begin at 6.5% for the first twelve-month period through the first anniversary of the security issue date, increasing ratably on a semi-annual basis, to 13.5% at the third anniversary of the security issue date until the convertible securities cease to be outstanding.
Description of Interest Rate Derivative Activities						The embedded feature discount factors begin at 75.0% for the first twelve-month period through the first anniversary of the security issue date, decreasing ratably on a semi-annual basis, to 55.0% at the forty-two month anniversary of the security issue date until the convertible securities cease to be outstanding
Carrying value of the convertible securities	2,600,000
Unamortized discount								337,300,000
Capital contribution for extinguishment of debt	126,800,000
Fair value of embedded derivative liability								44,800,000
Convertible Securities [Member] | Tranche One [Member]
Debt Instrument [Line Items]
Debt instrument, accrued interest	400,000
Convertible Securities [Member] | Other Tranche [Member]
Debt Instrument [Line Items]
Debt instrument, accrued interest	$ 7,400,000
Convertible Securities [Member] | Common Class Z [Member]
Debt Instrument [Line Items]
Debt instrument conversion, shares issued	1,310,787
Debt instrument, redeemed and converted, shares issued	36,117,708
Debt instrument, redeemed, shares issued	34,806,921
Convertible Securities [Member] | Common Class B [Member]
Debt Instrument [Line Items]
Debt instrument conversion, shares issued	74,694,107
2020 Convertible Note [Member]
Debt Instrument [Line Items]
Unamortized debt issuance cost						$ 100,000		$ 100,000
Qualified Public Offering [Member] | Convertible Securities [Member]
Debt Instrument [Line Items]
Charge to account for dilution		9.40%