Note 10 - Property, Plant and Equipment

3 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

10.

Property, Plant and Equipment

The cost and accumulated depreciation of property and equipment at 

June 30, 2019

and 

March 31, 2019

are as follows (in thousands):

	June 30, 2019			March 31, 2019
Construction in progress - equipment	$	1,336		$	603
Equipment and software		45,791			45,705
Furniture and fixtures		1,271			1,269
Leasehold improvements		1,983			1,955
Property, plant and equipment, gross		50,380			49,532
Less accumulated depreciation		(41,633	)		(40,560	)
Property, plant and equipment, net	$	8,747		$	8,972

Depreciation expense was $

1.1

million and

$1.1

million for the 

three

months ended 

June 30, 2019

and

2018

, respectively. Construction in progress - equipment primarily includes capital investments and leasehold improvements in the Company's leased facility in Ayer, Massachusetts.