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Defined Benefit Pension Plan | 12 Months Ended
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Dec. 30, 2017
Compensation And Retirement Disclosure [Abstract] |
Defined Benefit Pension Plan | Note 12. Defined Benefit Pension Plan Nanometrics sponsors a statutory government mandated defined benefit pension plan (the “Benefit Plan”) in Taiwan for its local employees. The fair value of plan assets was $0.3 million for fiscal year ended 2017, and $0.2 million for each of fiscal years 2016 and 2015, respectively; and the net funding deficiency of the Benefit Plan was $0.5 million, $0.4 million, and $0.3 million for the fiscal years ended December 30, 2017, December 31, 2016, and December 26, 2015, respectively. Based on the nature and limited extent of the pension plan, we determined this pension plan was not material for separate disclosure.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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