Description of Business - Additional Information (Detail) - USD ($)		6 Months Ended	9 Months Ended	12 Months Ended
		Jun. 30, 2022	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 29, 2023	Jan. 06, 2023	Oct. 12, 2022	Oct. 11, 2022	May 23, 2022	May 17, 2022	Sep. 27, 2021
Nature Of Operations [Line Items]
Remaining amount	[1]			$ 27,656,000	$ 13,304,000
Warrants or rights exercise price				$ 0.0001
Accumulated deficit		$ (23,666,000)	$ (25,738,000)	$ (29,203,000)
Unrestricted cash and cash equivalents				3,661,000	1,664,000
Cash in operations		$ (60,912,000)	$ (70,764,000)	(80,635,000)	$ 2,249,000	$ (14,000)
Anticipated savings in operating expenses over next twelve months				$ 21,500,000
Working Capital Credit Agreement [Member]
Nature Of Operations [Line Items]
Line of credit facility, maximum borrowing capacity							$ 48,000,000
Servicing Agreement [Member] | Prudent Group [Member]
Nature Of Operations [Line Items]
Percentage of annual return on amount paid for net recovery proceeds				18.00%
Investment Capacity Agreement [Member] | Virage Capital Management LP [Member]
Nature Of Operations [Line Items]
Maximum amount of paid amount purchasable pursuant to Agreement													$ 3,000,000,000
Percentage of recoveries payable to assignor													50.00%
Percentage of recoveries from the assignor													50.00%
Common Stock Purchase Agreement [Member] | Cantor Fitzgerald [Member]
Nature Of Operations [Line Items]
Percentage of volume of weighted average price of common stock to sell under purchase agreement												98.00%
Advertising Costs Agreements [Member] | Life Wallet LLC [Member]
Nature Of Operations [Line Items]
Contractual agreements within next 12 months				$ 5,500,000
Agreements [Member] | Prudent Group [Member]
Nature Of Operations [Line Items]
Maximum monetize amount of net recovery interest in claim demand				$ 250,000,000
Percentage of amount paid on claim				90.00%
Warrants [Member]
Nature Of Operations [Line Items]
Option to repurchase of warrants				$ 80,000,000
Warrants [Member] | Claims Proceeds Investment Agreement Member
Nature Of Operations [Line Items]
Percentage of shares obtained through warrant			15.00%						15.00%
Warrant and rights outstanding			$ 80,000,000						$ 80,000,000	$ 143,000,000
Warrants or rights exercise price			$ 1.20						$ 1.20
Common Stock [Member] | Subsequent Event [Member] | Common Stock Purchase Agreement [Member] | YA II PN, Ltd
Nature Of Operations [Line Items]
Option to sell maximum shares value under purchase agreement								$ 1,000,000,000
Class V Common Stock Units [Member] | Non Economic Voting Shares [Member]
Nature Of Operations [Line Items]
Common stock par or stated value per share											$ 0.0001
Common Class A [Member]
Nature Of Operations [Line Items]
Common stock par or stated value per share				$ 0.0001
Maximum amount of common shares to be purchased				5,500,000,000
Common stock issued				$ 7,000
Warrants or rights exercise price				$ 11.50
Common Class A [Member] | Common Stock Purchase Agreement [Member] | Cantor Fitzgerald [Member]
Nature Of Operations [Line Items]
Option to sell maximum shares value under purchase agreement												$ 1,000,000,000
Common Class A [Member] | Claims Proceeds Investment Agreement Member
Nature Of Operations [Line Items]
Common stock par or stated value per share			$ 0.0001						$ 0.0001
Maximum amount of common shares to be purchased			66,666,666						66,666,666
Common stock issued			$ 6,666.67						$ 6,666.67
Common Class A [Member] | Subsequent Event [Member] | Common Stock Purchase Agreement [Member] | Cantor Fitzgerald [Member]
Nature Of Operations [Line Items]
Date of termination								Jan. 06, 2023

[1] As of December 31, 2022 and 2021, the total affiliate receivable, affiliate payable, guaranty obligation and loan from related parties balances are with related parties. In addition, the prepaid expenses and other current assets, Claims financing obligation and notes payable and interest payable includes balances with related parties. See Note 14, Related Party, for further details.