Name:	glyc_AccruedLicenseAndMilestoneFees
Namespace Prefix:	glyc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.

No definition available.

Name:	glyc_ArrangementsAndNonarrangementTransactionsLineItems
Namespace Prefix:	glyc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The number of indications that trigger payment of milestones under the agreement.

No definition available.

Name:	glyc_NumberOfIndicationsTriggeringMilestonePaymentsUnderAgreement
Namespace Prefix:	glyc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the potential payment that may be received upon achievement of specified milestones per agreement.

No definition available.

Name:	glyc_PotentialPaymentForAchievementOfSpecifiedMilestones
Namespace Prefix:	glyc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of cash inflow (outflow) related to contingent consideration receivable or payable.

No definition available.

Name:	glyc_ProceedsFromPaymentsForContingentConsiderationOperatingActivities
Namespace Prefix:	glyc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the royalty commitment due as a percent of the milestone payments received under licensing arrangement.

No definition available.

Name:	glyc_RoyaltyCommitmentDueAgainstLicenseFeesReceivedAsPercent
Namespace Prefix:	glyc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Period of time over which the up-front payment received was recognized as revenue.

No definition available.

Name:	glyc_UpfrontPaymentRecognitionPeriod
Namespace Prefix:	glyc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1)
-URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 13.A.3)
-URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780

Name:	us-gaap_DeferredRevenueAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of revenue recognized that was previously reported as deferred or unearned revenue.

Name:	us-gaap_DeferredRevenueRevenueRecognized1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of consideration recognized during the period for the milestone or milestones.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 28
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=68058744&loc=SL6892177-166501

Name:	us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	us-gaap_TypeOfArrangementAxis=glyc_LicenseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CounterpartyNameAxis=glyc_PfizerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DeferredRevenueArrangementTypeAxis=us-gaap_UpFrontPaymentArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TypeOfArrangementAxis=glyc_ResearchServicesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CounterpartyNameAxis=glyc_UniversityOfBaselMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=glyc_AchievementOfSpecifiedDevelopmentMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=glyc_AchievementOfSpecifiedRegulatoryMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: