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BALANCE SHEET INFORMATION (Tables)
 3 Months Ended
Jun. 30, 2021
Balance Sheet Related Disclosures [Abstract]  
Schedule of manufacturing inventories
Manufacturing inventories
June 30, 2021March 31, 2021
   Finished goods:
      Manufactured finished goods $12,948 $12,452 
      Distributor inventory255 238 
         Total finished goods13,203 12,690 
   Work in progress2,419 2,074 
   Raw materials12,050 9,703 
Total manufacturing inventories$27,672 $24,467 
Schedule of service part inventories
Service parts inventories
June 30, 2021March 31, 2021
   Finished goods$18,195 $18,773 
   Component parts5,337 4,648 
Total service parts inventories$23,532 $23,421 
Summary of carrying value of intangible assets
Intangibles, net
June 30, 2021March 31, 2021
GrossAccumulated AmortizationNetGrossAccumulated AmortizationNet
   Developed technology$4,700 $(863)$3,837 $4,700 $(473)$4,227 
   Customer lists900 (165)735 900 (90)810 
Intangible assets, net$5,600 $(1,028)$4,572 $5,600 $(563)$5,037 
Future expected amortization expense for intangible assets As of June 30, 2021, the future expected amortization expense for intangible assets is as follows (in thousands):
Fiscal year ending Estimated future amortization expense
Remainder of 20221,402 
20231,867 
20241,303 
Thereafter— 
Total$4,572