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Contractual Payment Obligation - Additional Information (Detail) - USD ($)		3 Months Ended		12 Months Ended
	Apr. 13, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2012
Related Party Transaction [Line Items]
Interest accreted on contractual payment obligation		$ 32,000	$ 44,000
Secure Keyboards Ltd
Related Party Transaction [Line Items]
Percentage of ownership by a related party following acquisition		24.50%		30.00%
Secure Networks Ltd
Related Party Transaction [Line Items]
Percentage of ownership by a related party following acquisition				9.00%
Settlement Agreement | Subsequent Event
Related Party Transaction [Line Items]
Amended installment payment, contractual payment period	Oct. 31, 2021
Increase in contractual payment obligation	$ 90,000,000
Settlement Agreement | Maximum
Related Party Transaction [Line Items]
Installment payment, contractual payment year		2021

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- Definition

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- Definition

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- Definition

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- Definition

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- Definition

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