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Note 5 - Leases (Details Textual) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2018 USD ($) ft²	Nov. 28, 2021 USD ($)	Nov. 28, 2021 USD ($)
Operating Lease, Expense		$ 15	$ 44
Operating Lease, Payments		$ 38	$ 38
Operating Lease, Weighted Average Remaining Lease Term (Year)		7 years 3 months 18 days	7 years 3 months 18 days
Additional Manufacturing Facility [Member]
Area of Land (Square Foot) | ft²	90,000
Construction in Progress Estimated Cost	$ 19,300
Purchase Obligation, Total		$ 718	$ 718
Construction in Progress, Gross		18,078	18,078
Idle Facility in Singapore [Member] | Accrued Liabilities [Member]
Accrued Operating Lease Payments		$ 128	$ 128
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)		1 year	1 year
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)		10 years	10 years

X

- Definition

Represents accrued operating lease payments.

+ References

No definition available.

+ Details

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X

- Definition

Estimated future cash outflow to pay for construction in progress expenditures that have occurred.

+ References

No definition available.

+ Details

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X

- Definition

Area of land held.

+ References

No definition available.

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X

- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
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- Definition

Term of lessee's operating lease renewal, 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 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

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X

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

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X

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977

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X

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

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- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

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