Warrants weighted- average exercise price of warrants.

No definition available.

Name:	OTLC_ClassOfWarrantWeightedAverageExercisePriceOfWarrants
Namespace Prefix:	OTLC_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=OTLC_ExercisePriceOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=OTLC_ExercisePriceTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=OTLC_ExercisePriceThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=OTLC_ExercisePriceFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SCHEDULE OF WARRANTS OUTSTANDING AND EXERCISABLE (Details) - $ / shares	Dec. 31, 2021	Mar. 31, 2021	Jul. 31, 2020
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Warrants Outstanding, Number of Warrants	53,314,424
Warrants Exercisable, Weighted Average Remaining Life In Years	1 year 11 months 19 days
Warrants Weighted- Average Exercise Price	$ 0.19
Warrants Exercisable, Exercisable Number of Warrants	53,314,424
Warrant [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Warrants Exercisable, Exercisable Number of Warrants		100,000	100,000
Exercise Price 1 [Member] \| Warrant [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Warrants Outstanding, Exercise Price	$ 0.20
Warrants Outstanding, Number of Warrants	1,487,500
Warrants Exercisable, Weighted Average Remaining Life In Years	1 year 3 months 29 days
Warrants Weighted- Average Exercise Price	$ 0.20
Warrants Exercisable, Exercisable Number of Warrants	1,487,500
Exercise Price 2 [Member] \| Warrant [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Warrants Outstanding, Exercise Price	$ 0.20
Warrants Outstanding, Number of Warrants	27,500,000
Warrants Exercisable, Weighted Average Remaining Life In Years	1 year 3 months
Warrants Weighted- Average Exercise Price	$ 0.20
Warrants Exercisable, Exercisable Number of Warrants	27,500,000
Exercise Price 3 [Member] \| Warrant [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Warrants Outstanding, Exercise Price	$ 0.20
Warrants Outstanding, Number of Warrants	13,750,000
Warrants Exercisable, Weighted Average Remaining Life In Years	1 year 2 months 23 days
Warrants Weighted- Average Exercise Price	$ 0.20
Warrants Exercisable, Exercisable Number of Warrants	13,750,000
Exercise Price 4 [Member] \| Warrant [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Warrants Outstanding, Exercise Price	$ 0.13
Warrants Outstanding, Number of Warrants	10,576,924
Warrants Exercisable, Weighted Average Remaining Life In Years	5 years
Warrants Weighted- Average Exercise Price	$ 0.13
Warrants Exercisable, Exercisable Number of Warrants	10,576,924