Annual report [Section 13 and 15(d), not S-K Item 405]

Segment Information (Schedule of Segment Information) (Details)

v3.26.1
Segment Information (Schedule of Segment Information) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Revenue    
Product revenue, net $ 61,239 $ 55,134
Collaboration revenue   1,500
Other revenue 2,023 1,000
Net revenue 63,262 57,675
Operating expenses    
Cost of goods - (excluding amortization of acquired intangible assets) 20,924 20,879
Amortization of acquired intangible assets 4,258 3,424
Research and development 11,901 56,629
Research and development - licenses acquired   252
Selling, general and administrative 96,400 87,731
Loss recovery   (4,553)
Asset impairment 0 3,692
Total operating expenses 133,483 168,054
Loss from operations (70,221) (110,379)
Other income (expense)    
Interest income 2,485 2,683
Interest expense and financing fee (10,106) (13,527)
Gain (loss) on common stock warrant liabilities (398) (638)
Gain from deconsolidation of subsidiary 27,127 0
Other income (expense) 17,578 1,318
Total other income (expense) 36,686 (10,164)
Loss before income tax expense (33,535) (120,543)
Income tax expense (benefit) (620) 312
Net loss (32,915) (120,855)
Attributable to non-controlling interests 39,730 74,858
Net income (loss) attributable to Fortress 6,815 (45,997)
Other Significant Items    
Depreciation expense 403 1,040
Additions to intangible assets   15,000
Change in fair value of equity method investment accounted for at fair value within other income 15,075  
Segment assets 185,548 144,223
Stock-based compensation - Research & development 6,267 7,121
Stock-based compensation - Selling, general and administrative $ 22,472 25,498
Number of reportable segments not disclosed flag true  
Journey    
Revenue    
Product revenue, net $ 61,239 55,134
Other revenue 619 1,000
Net revenue 61,858 56,134
Operating expenses    
Cost of goods - (excluding amortization of acquired intangible assets) 20,924 20,879
Amortization of acquired intangible assets 4,258 3,424
Research and development 480 9,857
Selling, general and administrative 44,368 40,204
Loss recovery   (4,553)
Total operating expenses 70,030 69,811
Loss from operations (8,172) (13,677)
Other income (expense)    
Interest income 589 757
Interest expense and financing fee (3,698) (2,700)
Gain (loss) on common stock warrant liabilities   1,125
Other income (expense) (90) (116)
Total other income (expense) (3,199) (934)
Loss before income tax expense (11,371) (14,611)
Income tax expense (benefit) 60 61
Net loss (11,431) (14,672)
Other Significant Items    
Additions to intangible assets   15,000
Segment assets 94,589 80,241
Stock-based compensation - Research & development   508
Stock-based compensation - Selling, general and administrative 6,288 5,590
Avenue    
Revenue    
Other revenue 1,404  
Net revenue 1,404  
Operating expenses    
Research and development 1,037 6,645
Selling, general and administrative 3,450 4,638
Total operating expenses 4,487 11,283
Loss from operations (3,083) (11,283)
Other income (expense)    
Interest income 121 176
Gain (loss) on common stock warrant liabilities 15 (589)
Total other income (expense) 136 (413)
Loss before income tax expense (2,947) (11,696)
Net loss (2,947) (11,696)
Other Significant Items    
Segment assets 2,931 2,672
Stock-based compensation - Research & development 124 269
Stock-based compensation - Selling, general and administrative 541 967
Checkpoint    
Revenue    
Net revenue   41
Operating expenses    
Research and development 10,775 36,152
Selling, general and administrative 27,263 20,063
Total operating expenses 38,038 56,215
Loss from operations (38,038) (56,174)
Other income (expense)    
Interest income 90 11
Gain (loss) on common stock warrant liabilities (108) (73)
Other income (expense) (3) (4)
Total other income (expense) (21) (66)
Loss before income tax expense (38,059) (56,240)
Net loss (38,059) (56,240)
Other Significant Items    
Segment assets   7,471
Stock-based compensation - Research & development 4,782 5,248
Stock-based compensation - Selling, general and administrative 9,315 10,004
Mustang    
Operating expenses    
Research and development (1,516) 8,418
Selling, general and administrative 3,948 4,135
Asset impairment   3,692
Total operating expenses 2,432 16,245
Loss from operations (2,432) (16,245)
Other income (expense)    
Interest income 511 184
Interest expense and financing fee   (5)
Other income (expense)   314
Total other income (expense) 511 493
Loss before income tax expense (1,921) (15,752)
Net loss (1,921) (15,752)
Other Significant Items    
Depreciation expense   671
Segment assets 17,593 9,308
Stock-based compensation - Research & development (10) (650)
Stock-based compensation - Selling, general and administrative 139 200
Fortress    
Revenue    
Collaboration revenue   1,500
Net revenue   1,500
Operating expenses    
Research and development 1,125 (4,443)
Research and development - licenses acquired   252
Selling, general and administrative 17,371 18,691
Total operating expenses 18,496 14,500
Loss from operations (18,496) (13,000)
Other income (expense)    
Interest income 1,174 1,555
Interest expense and financing fee (6,408) (10,822)
Gain (loss) on common stock warrant liabilities (305) (1,101)
Gain from deconsolidation of subsidiary 27,127  
Other income (expense) 17,671 1,124
Total other income (expense) 39,259 (9,244)
Loss before income tax expense 20,763 (22,244)
Income tax expense (benefit) (680) 251
Net loss 21,443 (22,495)
Other Significant Items    
Depreciation expense   369
Change in fair value of equity method investment accounted for at fair value within other income 15,075  
Segment assets 70,435 44,531
Stock-based compensation - Research & development 1,371 1,746
Stock-based compensation - Selling, general and administrative 6,189 8,737
Related Party    
Revenue    
Revenue - related party   41
Related Party | Checkpoint    
Revenue    
Revenue - related party   41
Intersegment Eliminations | Avenue    
Operating expenses    
Research and development 326 329
Selling, general and administrative 304 331
Intersegment Eliminations | Checkpoint    
Operating expenses    
Research and development   7,638
Selling, general and administrative 261 1,495
Intersegment Eliminations | Mustang    
Operating expenses    
Research and development 523 861
Selling, general and administrative 644 579
Intersegment Eliminations | Fortress    
Operating expenses    
Research and development (849) (8,828)
Selling, general and administrative $ (1,209) $ (2,405)