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Subsequent Events - Additional information (Detail) - Subsequent Event [Member] | Mar. 28, 2020 CAD ($) | Mar. 24, 2020 USD ($) $ / shares shares
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Subsequent Event [Line Items] |  |
Capital Contribution | $ 16,000 |
Payments For Capital Contribution | 8,000 |
Capital Commitments | 8,000 |
Revolving Credit Facility [Member] |  |
Subsequent Event [Line Items] |  |
Maximum borrowing capacity | 7,500 |
Term Credit Facility [Member] |  |
Subsequent Event [Line Items] |  |
Maximum borrowing capacity | $ 12,500 |
Underwritten Public Offering [Member] |  |
Subsequent Event [Line Items] |  |
Number of shares issued | shares |  | 3,125,000
Sale of stock, price per share | $ / shares |  | $ 3.20
Gross proceeds from sale of stock |  | $ 11,500,000
Payments of Stock Issuance Costs |  | 690,000
Net proceeds from sale of stock |  | $ 10,710,000
Over-Allotment Option [Member] |  |
Subsequent Event [Line Items] |  |
Number of shares issued | shares |  | 468,750

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Period Type: | duration

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- Definition Capital Commitments. + References No definition available. + Details
Name: | vff_CapitalCommitments
Namespace Prefix: | vff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital Contribution. + References No definition available. + Details
Name: | vff_CapitalContribution
Namespace Prefix: | vff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Gross proceeds from sale of stock. + References No definition available. + Details
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Namespace Prefix: | vff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Payments For Capital Contribution. + References No definition available. + Details
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Namespace Prefix: | vff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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- Details
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Period Type: |

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- Details
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- Details
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- Details
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