XML 42 R24.htm IDEA: XBRL DOCUMENT
v3.25.2

Common Stock Warrants and Options (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Class of Warrant or Right [Line Items] |
Schedule of Warrant Activity | Stock warrant transactions for the six months ended June 30, 2025 were as follows: Schedule of Warrant Activity
|  | Six Months Ended June 30, 2025 |
|  | Number of |  |  | Weighted Average |
|  | Warrants |  |  | Exercise Price |
Warrants outstanding at December 31, 2024 |  |  | 1,120,429 |  |  | $ | 18.85 |
Granted |  |  | 16,468,308 |  |  |  | 2.04 |
Forfeited/cancelled |  |  | — |  |  |  | — |
Exercised |  |  | (837,069 | ) |  |  | 2.11 |
Warrants outstanding at June 30, 2025 |  |  | 16,751,668 |  |  | $ | 3.07 |
Warrants exercisable at June 30, 2025 |  |  | 4,995,263 |  |  | $ | 5.49 |
Schedule of Options Activity | Schedule of Options Activity
|  | Six Months Ended June, 2025 |
|  | Number of |  |  | Weighted Average |
|  | Options |  |  | Exercise Price |
Options outstanding at December 31, 2024 |  |  | 124,600 |  |  | $ | 32.69 |
Granted |  |  | — |  |  |  | — |
Forfeited/cancelled |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |
Options outstanding at June 30, 2025 |  |  | 124,600 |  |  | $ | 32.69 |
Options exercisable at June 30, 2025 |  |  | 109,692 |  |  | $ | 36.85 |
Schedule of Options Outstanding and Options Exercisable | Options outstanding as of June 30, 2025 are exercisable as follows: Schedule of Options Outstanding and Options Exercisable
|  |  | Stock Options Exercisable as of June 30, 2025 |
Range of Exercise Price |  |  | Number Outstanding |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Weighted Average Exercise Price |
$ | 2.11 |  |  |  | 8,428 |  |  |  | 9.3 |  |  | $ | 2.11 |
| 10.50 |  |  |  | 16,666 |  |  |  | 7.8 |  |  |  | 10.50 |
| 25.50 |  |  |  | 50,000 |  |  |  | 7.6 |  |  |  | 25.50 |
| 74.40 |  |  |  | 34,598 |  |  |  | 7.0 |  |  |  | 74.40 |
|  |  |  |  | 109,692 |  |  |  |  |  |  |  |  |
Warrants [Member] |
Class of Warrant or Right [Line Items] |
Schedule of Warrants Outstanding and Exercisable | Warrants outstanding as of June 30, 2025 are exercisable as follows: Schedule of Warrants Outstanding and Exercisable
|  |  | Warrants Outstanding and Exercisable as of June 30, 2025 |
Range of Exercise Price |  |  | Number Outstanding |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Weighted Average Exercise Price |
$ | 0.0001 |  |  |  | 476,251 |  |  |  | N/A |  |  | $ | 0.0001 |
| 2.02 |  |  |  | 369,138 |  |  |  | 2.9 |  |  |  | 2.02 |
| 2.04 |  |  |  | 3,235,979 |  |  |  | 4.9 |  |  |  | 2.04 |
| 2.46 |  |  |  | 24,390 |  |  |  | 4.9 |  |  |  | 2.46 |
| 2.50 |  |  |  | 50,000 |  |  |  | 2.9 |  |  |  | 2.50 |
| 2.8375 |  |  |  | 21,145 |  |  |  | 4.7 |  |  |  | 2.8375 |
| 4.35 |  |  |  | 437,931 |  |  |  | 3.9 |  |  |  | 4.35 |
| 5.4375 |  |  |  | 88,800 |  |  |  | 3.9 |  |  |  | 5.4375 |
| 30.00 |  |  |  | 216,666 |  |  |  | 3.0 |  |  |  | 30.00 |
| 37.50 |  |  |  | 13,000 |  |  |  | 2.5 |  |  |  | 37.50 |
| 102.00 |  |  |  | 1,867 |  |  |  | 0.1 |  |  |  | 102.00 |
| 165.00 |  |  |  | 52,316 |  |  |  | 0.6 |  |  |  | 165.00 |
| 206.25 |  |  |  | 7,780 |  |  |  | 0.6 |  |  |  | 206.25 |
|  |  |  |  | 4,995,263 |  |  |  | 4.3 |  |  |  | 3.07 |

X
- Definition Schedule of Warrants Oustanding and Exercisable [Table Text Block] + References No definition available. + Details
Name: | GTBP_ScheduleOfWarrantsOustandingAndExercisableTableTextBlock
Namespace Prefix: | GTBP_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
Name: | us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=GTBP_WarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |