Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix:	gltc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Weighted average price at which holders acquired shares when converting equity instruments other than options into shares.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix:	gltc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Weighted average price at which grantees could have acquired the underlying shares with respect to equity instrument other than options that have expired.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsExpiredInPeriodWeightedAverageExercisePrice
Namespace Prefix:	gltc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Weighted average price at which grantees could have acquired the underlying shares with respect to warrants that were terminated.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice
Namespace Prefix:	gltc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of equity instruments other than options.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	gltc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	gltc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Weighted average price at which grantees can acquire the shares reserved for issuance for equity instruments other than options.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix:	gltc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

The number of shares into which fully or partially vested equity instruments other than options outstanding as of the balance sheet date can be currently converted under the non-option plan.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber
Namespace Prefix:	gltc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Weighted average remaining contractual term for awards other than options vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableRemainingContractualLife
Namespace Prefix:	gltc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRemainingContractualLifeAbstract
Namespace Prefix:	gltc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePriceRollForwardAbstract
Namespace Prefix:	gltc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Weighted average remaining contractual term for awards other than options granted, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	gltc_SharebasedCompensationArrangementBySharebasedPaymentAwardOtherThanOptionsGrantsInPeriodWeightedAverageRemainingContractualTerm
Namespace Prefix:	gltc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Number of non-option equity instruments exercised by participants.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of shares under non-option equity instrument agreements for which rights to exercise lapsed.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Net number of non-option equity instruments granted to participants.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901