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

Amount of non-refundable milestone payment received.

No definition available.

Name:	glyc_NonrefundableMilestonePaymentReceived
Namespace Prefix:	glyc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The number of clinical or regulatory milestones included in the transaction price of the agreement.

No definition available.

Name:	glyc_NumberOfClinicalOrRegulatoryMilestonesIncludedInTransactionPrice
Namespace Prefix:	glyc_
Data Type:	xbrli:integerItemType
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

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

The amount of consideration determined to be the transaction price under the agreement recognized under ASC 606.

No definition available.

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

Amount of up-front payment received under terms of the agreement.

No definition available.

Name:	glyc_UpFrontPaymentReceived
Namespace Prefix:	glyc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

No definition available.

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Name:	us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
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:	srt_CounterpartyNameAxis=glyc_PfizerMember
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:	srt_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:	srt_RangeAxis=srt_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: