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Note 6 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment, Gross	$ 38,328	$ 34,807
Accumulated depreciation	(16,330)	(12,741)
Property, plant and equipment, net	21,998	22,066
Land [Member]
Property, Plant and Equipment, Gross	889	889
Building [Member]
Property, Plant and Equipment, Gross	18,857	18,880
Manufacturing Equipment [Member]
Property, Plant and Equipment, Gross	12,163	9,851
Computer Equipment [Member]
Property, Plant and Equipment, Gross	4,350	3,601
Construction in Progress [Member]
Property, Plant and Equipment, Gross	985	242
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment, Gross	$ 1,084	$ 1,344

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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