XML 43 R23.htm IDEA: XBRL DOCUMENT
v3.23.1

Derivative Liability (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Derivative Liability |
Schedule of Derivative Liabilities Assumptions | The derivative liabilities were valued using a Binomial pricing model with the following average assumptions: Schedule of Derivative Liabilities Assumptions
|  | December 31, 2022 |  |  | December 31, 2021 |
Risk-free interest rate |  |  | 4.22 | % |  |  | 1.26 | %
Expected volatility |  |  | 109 | % |  |  | 129 | %
Expected life (in years) |  |  | 2.6 years |  |  |  | 3.6 years |
Expected dividend yield |  |  | - |  |  |  | - |
Fair value of warrants (in thousands) |  | $ | 19 |  |  | $ | 138 |
Schedule of Derivative Liability Transactions | Schedule of Derivative Liability Transactions
|  | December 31, 2022 (in thousands) |  |  | December 31, 2021 (in thousands) |
Beginning Balance |  | $ | 138 |  |  | $ | 384 |
Addition |  |  | - |  |  |  | - |
Extinguishment |  |  | - |  |  |  | (35 | )
Change in fair value |  |  | (119 | ) |  |  | (211 | )
Ending Balance |  | $ | 19 |  |  | $ | 138 |

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

X
- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of derivative liabilities at fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDerivativeLiabilitiesAtFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration