v3.7.0.1

Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Assets:
Total assets	$ 35,084	$ 35,014
Money market mutual funds
Assets:
Cash and cash equivalents, fair value disclosure	20,084	20,014
Certificates of deposit
Assets:
Cash and cash equivalents, fair value disclosure	15,000	15,000
Level 1
Assets:
Total assets	35,084	35,014
Level 1 | Money market mutual funds
Assets:
Cash and cash equivalents, fair value disclosure	20,084	20,014
Level 1 | Certificates of deposit
Assets:
Cash and cash equivalents, fair value disclosure	15,000	15,000
Level 2
Assets:
Total assets	0	0
Level 2 | Money market mutual funds
Assets:
Cash and cash equivalents, fair value disclosure	0	0
Level 2 | Certificates of deposit
Assets:
Cash and cash equivalents, fair value disclosure	0	0
Level 3
Assets:
Total assets	0	0
Level 3 | Money market mutual funds
Assets:
Cash and cash equivalents, fair value disclosure	0	0
Level 3 | Certificates of deposit
Assets:
Cash and cash equivalents, fair value disclosure	$ 0	$ 0

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ 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(12))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 35
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82895926&loc=d3e24584-111560

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-Name Accounting Standards Codification
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-Section S99
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-Name Accounting Standards Codification
-Topic 944
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-Section S99
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