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Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Property, plant and equipment, gross	$ 51,843	$ 49,532
Less accumulated depreciation	(43,003)	(40,560)
Property, plant and equipment, net	8,840	8,972
Construction in Progress [Member]
Property, plant and equipment, gross	2,812	603
Equipment and Software [Member]
Property, plant and equipment, gross	45,301	45,705
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,245	1,269
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 2,485	$ 1,955

X

- Definition

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

+ References

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-Subparagraph (SX 210.5-02.14)
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- Definition

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.

+ References

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

+ References

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