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SHARE-BASED COMPENSATION (Tables)
 6 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-Based Compensation Expense
The following is a summary of share-based compensation expense including restricted stock units and performance-based restricted stock units granted pursuant to the Company's Amended 2007 Plan and the Amended 2019 Plan, and employee stock purchases made under the Company's 2011 Amended and Restated Employee Stock Purchase Plan (ESPP), based on estimated fair values within the applicable cost and expense lines identified below (in thousands):
Three Months EndedSix Months Ended
September 30,September 30,
 2024202320242023
Cost of product revenue$295 $349 $726 $721 
Cost of service revenue1,905 2,289 4,794 4,828 
Research and development3,934 4,988 9,820 10,374 
Sales and marketing5,275 6,675 12,779 13,959 
General and administrative3,477 4,144 7,965 8,407 
$14,886 $18,445 $36,084 $38,289