The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

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

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

+ Details

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

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

Note 7 - Stock Options - Details of Options Outstanding (Details) - $ / shares	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Exercise price (in dollars per share)	$ 0.50	$ 0.49	$ 0.36
Number of options outstanding (in shares)	5,415,000	5,315,000	3,850,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	2,678,000
Range One [Member]
Exercise price (in dollars per share)	$ 0.350
Number of options outstanding (in shares)	3,600,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	2,160,000
Remaining contractual life (Year)	1 year 21 days
Range Two [Member]
Exercise price (in dollars per share)	$ 0.450
Number of options outstanding (in shares)	250,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	150,000
Remaining contractual life (Year)	1 year 5 months 23 days
Range Three [Member]
Exercise price (in dollars per share)	$ 1.200
Number of options outstanding (in shares)	500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	100,000
Remaining contractual life (Year)	1 year 6 months 29 days
Range Four [Member]
Exercise price (in dollars per share)	$ 0.800
Number of options outstanding (in shares)	375,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	150,000
Remaining contractual life (Year)	1 year 11 months 12 days
Range Five [Member]
Exercise price (in dollars per share)	$ 0.600
Number of options outstanding (in shares)	590,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	118,000
Remaining contractual life (Year)	2 years 3 months 14 days
Range Six [Member]
Exercise price (in dollars per share)	$ 0.80
Number of options outstanding (in shares)	100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	0
Remaining contractual life (Year)	2 years 7 months 2 days