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Note 12 - Leases (Details Textual)			12 Months Ended
	Jul. 31, 2019 USD ($) a	Feb. 29, 2016 USD ($) a	Dec. 31, 2020 USD ($)	Jul. 31, 2022 a	Mar. 31, 2020 a
Operating Lease, Cost			$ 47,000
Fenner Valley Farms LLC Lease Agreement [Member]
Lessor, Operating Lease, Term of Contract (Year)		99 years
Area of Real Estate Property (Acre) | a		2,100
Long-term Debt, Total		$ 12,000,000.0
Lessor, Operating Lease, Payment to be Received, Year One			420,000
Lessor, Operating Lease, Payment to be Received, Year Two			420,000
Lessor, Operating Lease, Payment to be Received, Year Three			420,000
Lessor, Operating Lease, Payment to be Received, Year Four			420,000
Lessor, Operating Lease, Payment to be Received, Year Five			420,000
SoCal Hemp JV LLC Lease Agreement [Member]
Lessor, Operating Lease, Term of Contract (Year)	5 years
Area of Real Estate Property (Acre) | a	1,280				242
Lessor, Operating Lease, Payment to be Received, Year One			121,000
Lessor, Operating Lease, Number of Renewals	3
Lessor, Operating Lease, Renewal Term (Year)	5 years
Lessor, Operating Lease Rental Income Per Acre of Leased Property	$ 500
Lessor, Operating Lease, Payment to be Received, Year Two			121,000
Lessor, Operating Lease, Payment to be Received, Year Three			121,000
Lessor, Operating Lease, Payment to be Received, Year Four			121,000
Lessor, Operating Lease, Payment to be Received, Year Five			$ 121,000
SoCal Hemp JV LLC Lease Agreement [Member] | Forecast [Member]
Area of Real Estate Property (Acre) | a				8,320
Minimum [Member]
Lessee, Lease, Remaining Term (Month)			3 months
Maximum [Member]
Lessee, Lease, Remaining Term (Month)			11 months
Maximum [Member] | SoCal Hemp JV LLC Lease Agreement [Member]
Area of Real Estate Property (Acre) | a	9,600

X

- Definition

The remaining terms of leassee's leases.

+ References

No definition available.

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+ References

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- Definition

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+ References

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- Definition

Amount of lease payment to be received by lessor for operating lease in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981

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- Definition

Amount of lease payment to be received by lessor for operating lease in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981

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- Definition

Amount of lease payment to be received by lessor for operating lease in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981

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- Definition

Amount of lease payment to be received by lessor for operating lease in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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Amount of lease payment to be received by lessor for operating lease in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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- Definition

Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
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-Paragraph 3
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+ References

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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Amount of cash inflow from lease payment, classified as operating activity.

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