Income Taxes - Additional Information (Detail)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Tax Credit Carryforward [Line Items]
Federal Income tax rate		35.00%
Federal statutory income tax rate		35.00%
Israeli Tax Authority [Member] \| Foreign Country [Member]
Tax Credit Carryforward [Line Items]
Income tax rate		24.00%
Scenario, Forecast [Member] \| Israeli Tax Authority [Member] \| Foreign Country [Member]
Tax Credit Carryforward [Line Items]
Income tax rate	23.00%
Scenario Plan [Member]
Tax Credit Carryforward [Line Items]
Federal Income tax rate	21.00%
Federal statutory income tax rate	21.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

Name:	us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration