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Commitments and Contingencies
9 Months Ended
Oct. 01, 2011
Commitments and Contingencies Disclosure [Abstract] 
Commitments and Contingencies
Commitments and Contingencies
In August 2005, KLA-Tencor Corporation (“KLA”) filed a complaint against the Company in the United States District Court for the Northern District of California (the “California Lawsuit”). The complaint alleges that certain of the Company's products infringe two of KLA's patents. On January 30, 2006, KLA added a third patent to its complaint. The complaint seeks a preliminary and permanent injunction against the sale of these products as well as the recovery of monetary damages and attorneys' fees. As part of its defense, the Company has filed requests for re-examinations of the allegedly infringed KLA patents with the U.S. Patent & Trademark Office (“PTO”). That is, the Company requested that the PTO review the KLA patents to determine whether or not the patents should remain enforceable as written.

In March 2006, the Court stayed the patent litigation case until the re-examinations are completed. On November 4, 2008, the PTO issued an Ex Parte Reexamination Certificate (indicating completion of the reexamination process) on one of the three patents-in-suit. On December 8, 2009, the PTO issued an Ex Parte Reexamination Certificate for another of the KLA patents-in-suit. On September 21, 2009, while the reexamination of the third patent-in-suit was still pending, the Company filed a second request for re-examination relating to the third patent. On March 30, 2010, the PTO issued an Ex Parte Reexamination Certificate as to the first reexamination of the third patent. On July 22, 2011, the PTO issued a Notice of Intent to issue Ex Parte Reexamination Certificate in the second reexamination of the third patent. In all four of the reexamination proceedings, the PTO has issued Office Actions rejecting numerous claims of KLA's patents and KLA has amended the claims in response. The California Lawsuit remains stayed by the Court. The Company believes it has meritorious defenses to the KLA claims and plans to vigorously defend the California Lawsuit. However, since the outcome of these lawsuits cannot be reasonably predicted, the range of contingent losses, if any, cannot be estimated, and accordingly, no amounts have been accrued.

In August 2011, the Company filed a complaint against KLA-Tencor Corporation in the United States District Court for the District of Delaware (the “Delaware Lawsuit”). In the complaint filed in the Delaware Lawsuit the Company alleges patent infringement against KLA. Specifically, the Company asserts that KLA's products infringe claims of two United States patents held by the Company. The complaint seeks injunctive relief against KLA's sale of these products as well as a recovery of monetary damages and attorneys' fees from KLA. The time for KLA to respond to any allegations in the complaint in the Delaware Lawsuit or file any counterclaims has not yet occurred. KLA has not yet undertaken any filings in the Delaware Lawsuit.
Intellectual Property Indemnification Obligations – The Company will, from time to time, in the normal course of business, agree to indemnify certain customers against third party claims that Nanometrics’ products, when used for their intended purpose(s), infringe the intellectual property rights of such third parties or other claims made against the customer with whom it enters into contractual relationships. It is not possible to determine the maximum potential amount of liability under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances that are likely to be involved in each particular claim. Historically, the Company has not made payments under these obligations and believes that the estimated fair value of these agreements is immaterial. Accordingly, no liabilities have been recorded for these obligations in the accompanying unaudited consolidated balance sheets as of October 1, 2011 and January 1, 2011.