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PROPERTY, PLANT AND EQUIPMENT
 12 Months Ended
Jun. 30, 2019
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
PROPERTY, PLANT AND EQUIPMENT
At June 30, 2019 and 2018, property, plant and equipment consisted of the following (in thousands):
 
 
 
 
June 30,
 
 
Useful Life 
 
2019
 
2018
Furniture and fixtures
 
3 to 5 years
 
$
245

 
$
245

Plant and equipment
 
3 to 17 years
 
8,683

 
8,241

Manufacturing
 
15 years
 
169

 
169

Computers and software
 
3 to 5 years
 
2,179

 
2,064

Leasehold improvements
 
Life of Lease
 
2,792

 
2,729

Land
 
 
 
19

 
19

Construction-in-progress
 
 
 
275

 
716

 
 
 
 
14,362

 
14,183

Less: accumulated depreciation
 
 
 
8,495

 
7,611

Net property, plant and equipment
 
 
 
$
5,867

 
$
6,572


Total depreciation expense in the fiscal years ended June 30, 2019, 2018 and 2017 was $1.1 million, $1.0 million and $0.9 million, respectively. Depreciation expense included in cost of revenues in the fiscal years ended 2019, 2018 and 2017 was $0.8 million, $0.8 million and $0.7 million, respectively.