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Leases - Components of Lease Expense included in Condensed Consolidated Statement of Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Lessor Lease Description [Line Items] |  |
Total operating lease expense | $ 773 | $ 819
Selling, General and Administrative Expenses [Member] |  |
Lessor Lease Description [Line Items] |  |
Total operating lease expense | 327 | 349
Research and Development Expenses [Member] |  |
Lessor Lease Description [Line Items] |  |
Total operating lease expense | 425 | 454
Cost of Sales [Member] |  |
Lessor Lease Description [Line Items] |  |
Total operating lease expense | $ 21 | $ 16

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 + Details
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- Details
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- Details
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