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Note 8 - Inventory
3 Months Ended
Jun. 30, 2019
Notes to Financial Statements  
Inventory Disclosure [Text Block]
8.
Inventory
 
Inventory, net of reserves, at 
June 30, 2019
and 
March 31, 2019
consisted of the following (in thousands):
 
   
June 30, 2019
   
March 31, 2019
 
Raw materials
  $
6,604
    $
5,474
 
Work-in-process
   
1,039
     
1,922
 
Finished goods
   
3,193
     
4,405
 
Deferred program costs
   
1,088
     
318
 
Net inventory
  $
11,924
    $
12,119
 
 
The Company recorded inventory write-downs of $
0.1
million and
$0.1
million for the 
three
months ended 
June 30, 2019
and
2018
, respectively. These write-downs were based on the Company's evaluation of its inventory on hand for excess quantities and obsolescence.
 
Deferred program costs as of 
June 30, 2019
and 
March 31, 2019
primarily represent costs incurred on programs where the Company needs to complete performance obligations before the related revenue and costs will be recognized.