Summary of Fair Values of Assets Acquired and Liabilities Assumed at Acquisition (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Feb. 14, 2018
Business Acquisition [Line Items]
Goodwill	$ 5,781
3VR
Business Acquisition [Line Items]
Cash		$ 195
Accounts receivable		2,029
Inventory		257
Prepaid expenses and other current assets		169
Property and equipment		334
Finite-lived intangibles		6,300
Total identifiable assets acquired		9,284
Accounts payable		(1,590)
Accrued expenses and liabilities		(711)
Deferred revenue		(2,928)
Debt		(3,622)
Total liabilities assumed		(8,851)
Net identifiable assets acquired		433
Goodwill	$ 5,781	5,781
Purchase price		6,214
3VR \| Trademarks
Business Acquisition [Line Items]
Finite-lived intangibles		400
3VR \| Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangibles		2,900
3VR \| Developed Technology
Business Acquisition [Line Items]
Finite-lived intangibles		$ 3,000

Business combination recognized identifiable assets acquired and liabilities assumed accrued expenses and liabilities.

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Amount of assets acquired at the acquisition date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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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, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of long-term debt due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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