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Summarizes The Revenue Expected to be Recognized in Future Related to Unsatisfied Performance Obligations (Detail) - Unsatisfied Performance Obligations - USD ($) $ in Thousands | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018
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'Revenue expected to be recognized in future related to unsatisfied performance obligations [Line Items] |  |  |
Contract liabilities/deferred revenue |  |  | $ 1,244
Scenario, Forecast |  |  |
'Revenue expected to be recognized in future related to unsatisfied performance obligations [Line Items] |  |  |
Contract liabilities/deferred revenue | $ 552 | $ 692 |

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 + Details
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Balance Type: | credit
Period Type: | instant

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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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- Details
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- Details
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