Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice
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Data Type:	num:perShareItemType
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Weighted average price at which holders acquired shares when converting equity instruments other than options into shares.

No definition available.

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Data Type:	num:perShareItemType
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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.

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

No definition available.

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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.

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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.

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Data Type:	num:perShareItemType
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Weighted average price at which grantees can acquire the shares reserved for issuance for equity instruments other than options.

No definition available.

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Data Type:	num:perShareItemType
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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
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Data Type:	xbrli:sharesItemType
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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
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Data Type:	xbrli:durationItemType
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- References

No definition available.

Name:	gltc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRemainingContractualLifeAbstract
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Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Weighted Average Exercise Price Roll Forward [Abstract]

No definition available.

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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
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Data Type:	xbrli:durationItemType
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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.

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Data Type:	xbrli:durationItemType
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Period Type:	duration

Number of non-option equity instruments exercised by participants.

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Data Type:	xbrli:sharesItemType
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Period Type:	duration

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

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Data Type:	xbrli:sharesItemType
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Period Type:	duration

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

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Data Type:	xbrli:sharesItemType
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Net number of non-option equity instruments granted to participants.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.