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Description of Business and Significant Accounting Policies - Schedule of Segment Revenues and Significant Expense Categories in Consolidated Statements of Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Revenues:                
Total revenues $ 82,130     $ 70,079     $ 237,011 $ 208,728
Less significant segment expenses (income):                
Cost of goods sold - commercial 4,498     3,197     12,873 12,621
Research and development 14,063     12,926     38,760 34,755
Interest income, net (2,628)     (3,179)     (6,416) (9,790)
Consolidated net income 7,985 $ 668 $ 13,158 11,550 $ (2,014) $ 10,630 21,811 20,166
Other Significant Segment                
Revenues:                
Total revenues 82,130     70,079     237,011 208,728
Less significant segment expenses (income):                
Cost of goods sold - commercial 4,498     3,197     12,873 12,621
Cost of revenue - collaborations and services 15,705     14,826     45,414 44,377
Research and development 14,063     12,926     38,760 34,755
Selling 14,694     13,093     43,335 36,189
General and administrative 14,394     10,823     42,389 34,168
Interest income, net (2,628)     (3,179)     (6,416) (9,790)
Interest expense, net 7,334     8,360     24,157 30,500
Impairment of available-for-sale investment 6,409           6,409 1,550
Loss on settlement of debt               7,050
Other segment items (324)     (1,517)     8,279 (2,858)
Consolidated net income 7,985     11,550     21,811 20,166
Afrezza | Other Significant Segment                
Revenues:                
Total revenues 18,493     15,035     51,709 45,762
V-Go | Other Significant Segment                
Revenues:                
Total revenues 3,812     4,693     12,023 13,510
Collaborations and services                
Revenues:                
Total revenues 26,506     23,268     78,727 74,130
Less significant segment expenses (income):                
Cost of revenue - collaborations and services 15,705     14,826     45,414 44,377
Collaborations and services | Other Significant Segment                
Revenues:                
Total revenues 26,506     23,268     78,727 74,130
Royalties                
Revenues:                
Total revenues 33,319     27,083     94,552 75,326
Royalties | Other Significant Segment                
Revenues:                
Total revenues $ 33,319     $ 27,083     $ 94,552 $ 75,326