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Subsequent Events	6 Months Ended
Subsequent Events	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On October 9, 2018, the Company acquired certain assets of CoScale NV, a public limited liability company organized and existing under the laws of Belgium that provides solutions for monitoring the performance of software container environments, for $6.3 million (€5.5 million) in cash. The Company will hold back approximately $850 thousand (€750 thousand) from the aggregate purchase price. The Company expects to record goodwill arising from the acquisition. The amount of goodwill is not expected to be deductible for tax purposes. The fair value of intangible assets and acquired assets and liabilities will be determined as of the acquisition date but are still being evaluated as of the date of this report.