Composition of Certain Financial Statement Captions - Summary of Prepaid Expense and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Prepaid Expense And Other Assets Current [Abstract]
Prepaid expenses	$ 13,603	$ 13,865
Capitalized commissions costs	3,770	2,828
Other current assets	1,132	487
Prepaid expenses and other current assets	$ 18,505	$ 17,180

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer; classified as current.

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Amount of current assets classified as other.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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