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Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 880	$ 950
Unused Virtual Point
Deferred Revenue Arrangement [Line Items]
Deferred revenue	702	724
Unamortized Virtual Items
Deferred Revenue Arrangement [Line Items]
Deferred revenue	168	$ 226
Advances For Pre-Order Items
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 10

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- Definition

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+ References

No definition available.

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- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(5))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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