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Income Taxes - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2017 USD ($)
Income Tax Examination [Line Items]
Gross liability for tax positions	$ 115,000
Tax positions that will be resolved within the next twelve months	$ 54,000
Income tax examination years description	The Company is no longer subject to U.S. Federal income tax examinations for the years prior to 2014.
State Jurisdiction | Minimum
Income Tax Examination [Line Items]
Income tax examination year	2013
State Jurisdiction | Maximum
Income Tax Examination [Line Items]
Income tax examination year	2016

X

- Definition

A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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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.

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Tax year being audited in the income tax examination, in CCYY format.

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Amount recognized for uncertainty in income taxes classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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