XML 14 R6.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2023 USD ($)
Statement of Stockholders' Equity [Abstract] |
Common stock issuance costs, net | $ 0.2

X
- Definition Stock issued during period net of issuance costs. + References No definition available. + Details
Name: | glto_StockIssuedDuringPeriodNetOfIssuanceCosts
Namespace Prefix: | glto_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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