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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Oct. 01, 2019	Mar. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Advertising expenses		$ 9,560,000	$ 5,579,000	$ 4,678,000
Net foreign currency transaction gain (loss)		(1,918,000)	355,000	984,000
Asset retirement obligation		780,000	1,420,000
Net carrying value		$ 0
Software updates and customer support costs amortization period		5 years
Total stockholders’ equity		$ 394,034,000	411,904,000	$ 391,303,000		$ 404,064,000
Hedvig, Inc.
Summary Of Significant Accounting Policies [Line Items]
Contingent consideration (up to)		8,000,000			$ 8,000,000
Developed technology
Summary Of Significant Accounting Policies [Line Items]
Acquired finite-lived intangible assets, useful life (in years)	5 years
Net carrying value		0
Customer relationships
Summary Of Significant Accounting Policies [Line Items]
Acquired finite-lived intangible assets, useful life (in years)	2 years
Net carrying value		$ 0
Cumulative Effect, Period of Adoption, Adjustment
Summary Of Significant Accounting Policies [Line Items]
Total stockholders’ equity			$ (84,000)
Minimum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)		10 years
Minimum | Computers, servers and other equipment
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)		18 months
Minimum | Furniture and fixtures
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)		3 years
Maximum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)		60 years
Maximum | Computers, servers and other equipment
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)		3 years
Maximum | Furniture and fixtures
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)		12 years
Arrow | Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage		36.00%	37.00%	38.00%
Customer concentration risk | Arrow | Accounts receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage		33.00%	31.00%

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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