Description of Business and Significant Accounting Policies - Additional Information (Detail)		1 Months Ended			6 Months Ended
		Jan. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)	Apr. 30, 2021 USD ($)	Jun. 30, 2023 USD ($) Segment	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Jul. 01, 2013 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Accumulated deficit					$ (3,232,529,000)		$ (3,217,469,000)
Cash and cash equivalents					86,184,000		69,767,000
Short-term investments					58,163,000		101,079,000
Long-term investments					2,282,000		1,961,000
Financing liability					$ 104,100,000		104,100,000
Number of operating segment | Segment					1
Purchase of available-for-sale investment						$ 5,000,000
Milestone Rights Payment					$ 5,000,000
Maximum | AFREZZA product sales
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Sales return right following product expiration in months					12 months
Minimum | AFREZZA product sales
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Sales return right following product expiration in months					6 months
Convertible Promissory Note | Thirona Bio, Inc.
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Purchase of available-for-sale investment		$ 5,000,000.0	$ 3,000,000.0
Interest rate					6.00%
MidCap Credit Facility
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Principal amount	[1]				$ 40,000,000		$ 40,000,000
Principal prepayment against outstanding term loans				$ 10,000,000.0
MidCap Credit Facility | Tranche Three
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Amount available under credit facility				$ 60,000,000.0	60,000,000.0			$ 25,000,000.0
Milestone Rights Liability | Deerfield
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Contingent liability remain payable					$ 60,000,000.0				$ 60,000,000.0
Milestone Rights Liability | Maximum | Deerfield
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Contingent liability for milestone payments									$ 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”).