XML 31 R20.htm IDEA: XBRL DOCUMENT
v3.25.2

REVENUE RECOGNITION (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Reconciliation of Gross Product Sales to Net Product Sales | The reconciliation of gross product sales to net product sales by each significant category of gross-to-net adjustments was as follows for the three and six months ended June 30, 2025 (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30, |  |
(in thousands) | 2025 |  | 2024 |  | 2025 |  | 2024 |  |
Gross product revenue | $ | 57,874 |  |  | $ | 890 |  |  | $ | 103,186 |  |  | $ | 890 |  |  |
Gross-to-net adjustments: |  |  |  |  |  |  |  |  |
Chargebacks, and customer credits | (7,890) |  |  | (97) |  |  | (13,587) |  |  | (97) |  |  |
Government rebates | (459) |  |  | (11) |  |  | (525) |  |  | (11) |  |  |
Sales returns and allowances | (518) |  |  | (2) |  |  | (631) |  |  | (2) |  |  |
Total gross-to-net adjustments | (8,867) |  |  | (110) |  |  | (14,743) |  |  | (110) |  |  |
Net product revenue | $ | 49,007 |  |  | $ | 780 |  |  | $ | 88,443 |  |  | $ | 780 |  |  |

X
- Definition Schedule of gross to net sales adjustments. + References No definition available. + Details
Name: | gern_ScheduleOfGrossToNetSalesAdjustmentsTableTextBlock
Namespace Prefix: | gern_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration