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Cash and Cash Equivalents	3 Months Ended
	Apr. 01, 2017
Cash and Cash Equivalents
Cash and Cash Equivalents	7. Cash and Cash Equivalents         Cash equivalents consist principally of money market funds with maturities of three months or less when purchased. As of April 1, 2017 and April 2, 2016, a substantial portion of CRA's cash accounts was concentrated at a single financial institution, which potentially exposes CRA to credit risks. The financial institution has a short-term credit rating of A-2 by Standard & Poor's ratings services. CRA has not experienced any losses related to such accounts. CRA does not believe that there is significant risk of non-performance by the financial institution, and its cash on deposit is fully liquid. CRA continually monitors the credit ratings of the institution.

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The entire disclosure of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities.

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