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Revenue - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Category	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Revenue [Line Items]
Number of categories | Category			3
Remaining performance obligations	$ 0		$ 0
Recognized revenue	2,400,000	$ 3,600,000	8,100,000	$ 10,500,000
Other Than Maintenance Services
Revenue [Line Items]
Remaining performance obligations	$ 16,000,000.0		$ 16,000,000.0		$ 13,600,000

X

- Definition

Sales information by product category.

+ References

No definition available.

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- Definition

Revenue.

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045

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