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Related Party Transaction
12 Months Ended
Dec. 30, 2016
Related Party Transactions [Abstract]  
Related Party Transactions Disclosure [Text Block]
Note 17: Related Party Transaction
 
On July 29, 2016, Exponent’s Board of Directors appointed Dr. Catherine Corrigan as its President. Dr. Paul Johnston continues to serve as the Company’s Chief Executive Officer. Dr. Corrigan relocated from the Company’s Philadelphia, Pennsylvania office to its Menlo Park, California office. In connection with the relocation, the Company purchased Dr. Corrigan’s primary residence in Pennsylvania for an appraised value of $1.25 million. The Company intends to resell the house as soon as practicable; therefore, the house is recorded in prepaid expenses and other assets.