Borrowing rate.

No definition available.

Name:	VTSI_BorrowingRate
Namespace Prefix:	VTSI_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Lease expires, description.

+ References

No definition available.

+ Details

Name:	VTSI_LesseeOperatingLeaseExpirationDescription
Namespace Prefix:	VTSI_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121549951&loc=d3e39896-112707

+ Details

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

- Definition

Net rentable area for properties owned.

+ References

No definition available.

+ Details

Name:	us-gaap_NetRentableArea
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

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

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

Name:	us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cash payments to lessor's for use of assets under operating leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	VTSI_LeaseContractTypeAxis=VTSI_LeaseAmendmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=VTSI_UnaffiliatedThirdPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=VTSI_OfficeandIndustrialSpaceMember
Namespace Prefix:
Data Type:	na
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Leases (Details Narrative)	1 Months Ended	12 Months Ended
Leases (Details Narrative)	Apr. 30, 2019 ft²	Dec. 31, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)	Jun. 30, 2019 ft²	Jan. 02, 2019 USD ($)	Dec. 31, 2018 USD ($)
Incremental in borrowing rate		4.50%
Operating lease liability		$ 1,174,882	$ 1,472,126		$ 1,721,380
Deferred rent		0	0		46,523
Operating lease right of use asset		1,094,527	1,390,873		$ 1,674,857	$ 1,674,857
Rent expenses		$ 412,315	$ 499,612
Lease Amendment [Member]
Rentable square feet \| ft²	5,131
Lease expires, description	April 2024
Office and Warehouse Space [Member] \| Unaffiliated Third Party [Member]
Rentable square feet \| ft²		37,729
Office and Industrial Space [Member] \| Unaffiliated Third Party [Member]
Rentable square feet \| ft²				4,529