Borrowings - MidCap Credit Facility - Additional Information (Detail)		1 Months Ended				3 Months Ended		12 Months Ended
	Apr. 22, 2021	Aug. 31, 2022	Apr. 30, 2021 USD ($)	Dec. 31, 2020 Installment	Aug. 31, 2019 USD ($) Installment	Mar. 31, 2023 USD ($)		Dec. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)
Debt Instrument [Line Items]
Maturity date	Dec. 31, 2025				Nov. 03, 2024
Debt instrument payment term description						Principal on each term loan advance under Tranche 1 and Tranche 2 are payable in 24 equal monthly installments beginning September 1, 2023, until paid in full on August 1, 2025.
Unamortized debt discount						$ 201,000
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%
MidCap Credit Facility
Debt Instrument [Line Items]
Prepaid of borrowing			$ 10,000,000.0
Debt instrument minimum unrestricted cash and short-term investments					$ 90,000,000.0
Principal prepayment against outstanding term loans			10,000,000.0
Debt instrument, prepayment penalty			1,000,000.0
Unamortized debt discount						$ 200,000
Debt Instrument unamortized prepayment penalty.						$ 400,000
Interest on loans increased, percentage					2.00%
MidCap Credit Facility | SOFR
Debt Instrument [Line Items]
Interest rate floor		1.00%				1.00%	[1]
Tranche 1
Debt Instrument [Line Items]
Maturity date					Aug. 01, 2025
Annual interest rate					8.25%
Debt payable number of equal monthly installments | Installment					24
Line of credit facility principal payment start date					Sep. 01, 2023
Tranche 1 | SOFR
Debt Instrument [Line Items]
Interest rate (LIBOR)					6.25%
Interest rate floor					1.00%
Tranche 1 | MidCap Credit Facility
Debt Instrument [Line Items]
Advance of borrowing					$ 40,000,000.0
Tranche 2
Debt Instrument [Line Items]
Maturity date				Aug. 01, 2025
Annual interest rate				8.25%				8.25%
Debt payable number of equal monthly installments | Installment				24
Line of credit facility principal payment start date				Sep. 01, 2023
Tranche 2 | SOFR
Debt Instrument [Line Items]
Interest rate (LIBOR)				6.25%
Interest rate floor				1.00%
Tranche 2 | MidCap Credit Facility
Debt Instrument [Line Items]
Advance of borrowing								$ 10,000,000.0
Tranche 3 | MidCap Credit Facility
Debt Instrument [Line Items]
Amount available under credit facility			$ 60,000,000.0			$ 60,000,000.0			$ 25,000,000.0
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						The MidCap credit facility has been amended several times, including in April 2021 when 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 and short-term investments following such investment.
Maximum value of additional investment limit			$ 9,000,000.0
Debt instrument minimum unrestricted cash and short-term investments			$ 90,000,000.0

[1] In August 2022, the Company amended the MidCap credit facility and transitioned the benchmark interest rate from LIBOR to the Secured Overnight Financing Rate (“SOFR”). The interest rate prior to the amendment was one-month LIBOR (1% floor) plus 6.25% (capped at a total of 8.25%).