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Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2021

Notes Tables

Property, Plant and Equipment, Useful Life [Table Text Block]

Category	Useful Lives
Buildings	40 years
Manufacturing equipment	7 years (or less)
Computer equipment	3 years (or less)

X

- Definition

Tabular disclosure of useful life for property, plant and equipment.

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No definition available.

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Balance Type:	na
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- References

No definition available.

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Data Type:	xbrli:stringItemType
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