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Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 21,221	$ 20,837
Accumulated depreciation	(15,093)	(14,201)
Property and equipment, net	6,128	6,636
Land and Office Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	7,713	7,515
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	6,578	6,509
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	6,856	6,739
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 74	$ 74

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
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-Section S99
-Paragraph 1
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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+ References

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-Subparagraph (SX 210.5-02(13))
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