Debt instrument advance available date.

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- Definition

Debt instrument exit fee percentage.

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- Definition

Debt instrument extended interest-only date.

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Debt instrument floor rate.

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- Definition

Debt instrument minimum cash covenant.

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Debt instrument minimum unrestricted cash.

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- Definition

Debt instrument payment number of equal monthly installments.

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- Definition

Early termination fees percentage.

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- Definition

Line of credit facility principal payment start date.

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Maximum value of additional investment limit.

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Term loan advance percentage of amount drawdown.

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- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Incremental percentage increase (decrease) in the stated rate on a debt instrument.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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Borrowings - MidCap Credit Facility - Additional Information (Detail) - MidCap Credit Facility		1 Months Ended					3 Months Ended	12 Months Ended
	Apr. 22, 2021 USD ($) Installment	Dec. 31, 2020 USD ($) Installment $ / shares shares	Nov. 30, 2020 USD ($) Installment $ / shares	Aug. 31, 2020 USD ($)	Dec. 31, 2019	Aug. 31, 2019 USD ($) Installment $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) $ / shares shares
Debt Instrument [Line Items]
Minimum cash covenant			$ 30,000,000.0			$ 10,000,000.0
Debt payable number of equal monthly installments \| Installment			24
Debt instrument payment term description							Principal on each term loan advance under Tranche 1, Tranche 2 and, if applicable, Tranche 3 is payable in 24 equal monthly installments beginning September 1, 2023, until paid in full on August 1, 2025.
Debt instrument minimum unrestricted cash						$ 90,000,000.0
Interest on loans increased, percentage						2.00%
Term loan advance percentage of amount drawdown						3.25%
Exercise price of warrants \| $ / shares			$ 2.91			$ 1.11
On or After April 23, 2022 Through and Including April 22, 2023
Debt Instrument [Line Items]
Early termination fees, percentage							2.00%
On or Prior to April 22, 2022
Debt Instrument [Line Items]
Early termination fees, percentage							3.00%
On or After April 23, 2023 Through Maturity Date
Debt Instrument [Line Items]
Early termination fees, percentage							1.00%
LIBOR
Debt Instrument [Line Items]
Interest rate floor							2.00%
Subsequent Event
Debt Instrument [Line Items]
Principal prepayment against outstanding term loans	$ 10,000,000.0
Original exit fee and prepayment penalties	1,000,000.0
Minimum
Debt Instrument [Line Items]
Debt Instrument Exit Fee Percentage					6.00%
Maximum
Debt Instrument [Line Items]
Debt Instrument Exit Fee Percentage					7.00%
Tranche 1
Debt Instrument [Line Items]
Advance of borrowing				$ 40,000,000.0		$ 40,000,000.0
Minimum cash covenant				$ 40,000,000.0
Debt payable number of equal monthly installments \| Installment						24
Loss on extinguishment of debt								$ 200,000
Maturity date						Aug. 01, 2025
Annual interest rate						8.25%
Line of credit facility principal payment start date						Sep. 01, 2023
Warrants to purchase of common stock \| shares						1,171,614
Exercise price of warrants \| $ / shares						$ 1.11
Tranche 1 \| LIBOR
Debt Instrument [Line Items]
Interest rate (LIBOR)						6.25%
Interest rate floor						1.00%
Tranche 2
Debt Instrument [Line Items]
Advance of borrowing								10,000,000.0
Amount available under credit facility		$ 10,000,000.0						$ 10,000,000.0
Debt payable number of equal monthly installments \| Installment		24
Debt discount and a de minimis amount of debt issuance costs							$ 300,000
Maturity date		Aug. 01, 2025
Annual interest rate		8.25%						8.25%
Line of credit facility principal payment start date		Sep. 01, 2023
Warrants to purchase of common stock \| shares		111,853						111,853
Exercise price of warrants \| $ / shares		$ 2.91						$ 2.91
Tranche 2 \| LIBOR
Debt Instrument [Line Items]
Interest rate (LIBOR)		6.25%
Interest rate floor		1.00%
Tranche 3
Debt Instrument [Line Items]
Amount available under credit facility						$ 60,000,000.0	$ 25,000,000.0
Tranche 3 \| Subsequent Event
Debt Instrument [Line Items]
Amount available under credit facility	$ 60,000,000.0
Debt payable number of equal monthly installments \| Installment	24
Debt instrument advance available date	Jun. 30, 2022
Debt instrument extended interest-only date	Sep. 01, 2023
Maturity date	Aug. 01, 2025
Debt instrument payment term description	On April 22, 2021, the Company entered into the seventh amendment of the MidCap credit facility, pursuant to which the parties agreed to, among other things, (i) increase the amount available under the third advance from $25.0 million to $60.0 million and extend the date through which the third advance is available to June 30, 2022, (ii) amend the conditions to the third advance of $60.0 million being available to draw, including certain milestone conditions associated with Tyvaso DPI, (iii) remove the Company’s obligation to issue a warrant to purchase shares of the Company’s common stock upon drawing down the third advance, (iv) extend the interest-only period until September 1, 2023 and extend the maturity date until August 1, 2025, (v) amend the financial covenant relating to trailing 12 month minimum Afrezza net revenue, (vi) decrease the minimum cash covenant, (vii) decrease the interest rate on any amounts outstanding, now or in the future, under the MidCap credit facility, (viii) permit the Company to make certain acquisitions, subject to requirements, and (ix) permit the Company to make investments of up to an additional $9.0 million so long as the Company has $90.0 million or more of unrestricted cash following such investment.
Maximum value of additional investment limit	$ 9,000,000.0
Debt instrument minimum unrestricted cash	$ 90,000,000.0
Annual interest rate	8.25%
Line of credit facility principal payment start date	Sep. 01, 2023
Tranche 3 \| Subsequent Event \| LIBOR
Debt Instrument [Line Items]
Interest rate (LIBOR)	6.25%
Interest rate floor	1.00%