Note 10 - Property, Plant and Equipment

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

10.

Property, Plant and Equipment

The cost and accumulated depreciation of property, plant and equipment at 

December 31, 2020

and 

March 31, 2020

are as follows (in thousands):

	December 31, 2020			March 31, 2020
Construction in progress - equipment	$	111		$	3,130
Land		270			—
Building		1,630			—
Equipment and software		41,743			41,737
Furniture and fixtures		1,310			1,302
Leasehold improvements		6,306			2,477
Property, plant and equipment, gross		51,370			48,646
Less accumulated depreciation		(41,823	)		(40,081	)
Property, plant and equipment, net	$	9,547		$	8,565

Depreciation expense was $

1.2

million and

$1.0

 million for the

three

months ended

December 31, 2020

and

2019

, respectively. Depreciation expense was $

2.9

 million and

$3.1

 million for the

nine

 months ended

December 31, 2020

and

2019

, respectively.  The decrease in construction in progress primarily relates to the completion of capital investments in the Company's HTS equipment and leasehold improvements in the Company's leased facilities in Westminster and Ayer, Massachusetts.  The increase in land and building relates to the property added as part of the NEPSI Acquisition.