Accrued paid in kind interest.

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Principal amount per share.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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Price of a single share of a number of saleable stocks of a company.

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Borrowings - Mann Group Promissory Notes - Additional Information (Detail) $ / shares in Units, $ in Millions		1 Months Ended		3 Months Ended	12 Months Ended
	Feb. 25, 2021 USD ($) shares	Jan. 31, 2021 USD ($) shares	Aug. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares
Debt Instrument [Line Items]
Common stock, shares issued \| shares				242,117,089	242,117,089	211,787,573
Principal amount				$ 122.9	$ 122.9
The Mann Group \| Convertible Promissory Note
Debt Instrument [Line Items]
Conversion price \| $ / shares				$ 2.50	$ 2.50
Principal amount				$ 28.0	$ 28.0	$ 35.0
Conversion of notes to common shares, value				7.0
Accrued interest paid-in-kind				$ 0.6	$ 0.6	1.0
Senior notes, effective interest rate				7.00%	7.00%
Conversion of notes to common shares, shares \| shares				2,800,000
The Mann Group \| Convertible Promissory Note \| Accrued Interest
Debt Instrument [Line Items]
Conversion of notes to common shares, value				$ 3.0
Conversion of notes to common shares, shares \| shares				1,200,000
The Mann Group \| Convertible Promissory Note \| Subsequent Event
Debt Instrument [Line Items]
Conversion of notes to common shares, value	$ 9.6	$ 9.6
Conversion of notes to common shares, shares \| shares	4,000,000.0	4,000,000.0
The Mann Group \| Convertible Promissory Note \| Subsequent Event \| Accrued Interest
Debt Instrument [Line Items]
Conversion of notes to common shares, value	$ 0.4
The Mann Group \| Non Convertible Promissory Note
Debt Instrument [Line Items]
Principal amount				$ 35.0	$ 35.0	35.1
Accrued interest paid-in-kind				$ 3.6	$ 3.6	$ 1.0
Senior notes, effective interest rate				7.00%	7.00%
The Mann Group \| New Loan Arrangement \| Convertible Promissory Note
Debt Instrument [Line Items]
Conversion price \| $ / shares			$ 2.50
Maturity date			Nov. 03, 2024
No of convertible shares			400
Principal amount per share \| $ / shares			$ 1,000
The Mann Group \| New Loan Arrangement \| Non Convertible Promissory Note
Debt Instrument [Line Items]
Debt instrument, maturity date, description					The Mann Group non-convertible note will mature on the earlier of (i) November 3, 2024 or (ii) the 90th day after the repayment in full, and termination and discharge of all obligations (other than contingent indemnity obligations) under the MidCap Credit Facility. Interest on the Mann Group non-convertible note will be payable in kind by adding the amount thereof to the principal amount; provided that the Company may, at its option, elect to pay any such interest on any interest payment date, if certain conditions are met, in shares of the Company’s common stock at a price per shall equal to the last reported sale price on the trading day immediately prior to the interest payment date.
The Mann Group \| New Loan Arrangement \| Promissory notes
Debt Instrument [Line Items]
Senior notes, effective interest rate			7.00%
Debt instrument payment term description					quarterly
Debt instrument, date of first required interest payment			Oct. 01, 2019
The Mann Group \| Privately Negotiated Exchange Agreement
Debt Instrument [Line Items]
Repayments of debt			$ 3.0
Common stock, shares issued \| shares			7,142,857
Conversion price \| $ / shares			$ 1.12
Conversion of notes to common shares, value			$ 71.5
Accrued interest paid-in-kind			$ 9.5
The Mann Group \| Privately Negotiated Exchange Agreement \| Loan Arrangement
Debt Instrument [Line Items]
Common stock price per share \| $ / shares			$ 2.50
The Mann Group \| Privately Negotiated Exchange Agreement \| Loan Arrangement \| Convertible Promissory Note
Debt Instrument [Line Items]
Principal amount			$ 35.0
The Mann Group \| Privately Negotiated Exchange Agreement \| Loan Arrangement \| Non Convertible Promissory Note
Debt Instrument [Line Items]
Principal amount			$ 35.1