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Sale of Vehicle Sensors (Details)
12 Months Ended 92 Months Ended 116 Months Ended
Jul. 29, 2011
Mar. 31, 2020
USD ($)
segment
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2020
segment
Sale of Vehicle Sensors            
Amount of earn-outs in connection with royalty   $ 114,117,000 $ 99,123,000 $ 103,729,000    
Net proceeds from sale of discontinued operation     107,000 511,000    
Number of discontinued operations business segments | segment   1       1
Gain on sale of discontinued operation, net of tax       242,000    
Vehicle Sensors segment            
Sale of Vehicle Sensors            
Additional cash consideration, percentage of revenue associated with royalties 85.00%          
Amount of earn-outs in connection with royalty         $ 2,700,000  
Type of revenue           iti:RoyaltyMember
Net proceeds from sale of discontinued operation         $ 18,000,000  
Gain on sale of discontinued operation, net of tax   $ 0 $ 0 $ 242,000