Commitments and Contingencies - Additional Information (Detail)	6 Months Ended
Jun. 30, 2021
Linksmart Litigation [Member]
Loss Contingencies [Line Items]
Litigation filing date	April 20, 2018
Securities Litigation [Member]
Loss Contingencies [Line Items]
Litigation filing date	June 27, 2018
Derivative Litigation [Member]
Loss Contingencies [Line Items]
Litigation filing date	September 25, 2018 and September 26, 2018

States the date the complaint was formally filed in a court of law, in arbitration or mediation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration