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INTANGIBLE ASSETS: (Tables)
 3 Months Ended
Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of amortization activity of intangible assets The following table shows the amortization activity of intangible assets (dollars in thousands):
June 30, 2020March 31, 2020
Developed technology, gross$66,473  $66,451  
Accumulated amortization(56,161) (54,713) 
Net developed technology$10,312  $11,738  
Customer relationship/Trade name, gross$42,997  $42,993  
Accumulated amortization(34,980) (33,109) 
Net customer/trade name$8,017  $9,884  
Publisher/Data supply relationships, gross$39,800  $39,800  
Accumulated amortization(18,214) (16,222) 
Net publisher relationship$21,586  $23,578  
Total intangible assets, gross$149,270  $149,244  
Total accumulated amortization(109,355) (104,044) 
Total intangible assets, net$39,915  $45,200  
Schedule of estimated future amortization expenses related to purchases and other intangible assets The following table presents the estimated future amortization expenses related to purchased intangible assets. The amount for 2021 represents the remaining nine months ending March 31, 2021 (dollars in thousands): 
Fiscal Year:
2021$12,077  
202214,092  
202311,683  
20242,063  
$39,915