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Revenue Recognition - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Apr. 01, 2018
Disaggregation of Revenue [Line Items]      
Net revenue $ 34,007 $ 33,865  
Revenue recognized 11,600    
Transfers to accounts receivable 3,000    
Capitalized contract cost, net     $ 1,900
Capitalized contract cost, amortization 900    
Products      
Disaggregation of Revenue [Line Items]      
Net revenue 9,080 $ 10,283  
Support, Maintenance, Subscription Services, And Professional Services [Member]      
Disaggregation of Revenue [Line Items]      
Net revenue $ 24,927