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Property and Equipment - Components of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 204,229	$ 197,938
Construction-in-progress	7,923	7,124
Accumulated depreciation and amortization	(68,233)	(65,472)
Total	135,996	132,466
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	41,683	42,460
Building and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	85,966	78,877
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	23,762	23,738
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,549	15,023
Tooling
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,895	13,079
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,289	7,734
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,669	8,885
Demonstration units
Property, Plant and Equipment [Line Items]
Property and equipment, gross	448	973
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 45	$ 45

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
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-SubTopic 10
-Section 50
-Paragraph 1
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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

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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.

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