Revenue Recognition (Tables)

9 Months Ended

Oct. 02, 2020

Revenue Recognition [Abstract]

Summary of Revenues

The following table discloses the percent of the Company’s revenue generated from time and materials contracts:

	Three Months Ended						Nine Months Ended
	October 2, 2020			September 27, 2019			October 2, 2020			September 27, 2019
Engineering & other scientific		59	%		68	%		62	%		67	%
Environmental and health		19	%		17	%		20	%		18	%
Total time and materials revenues		78	%		85	%		82	%		85	%

The following table discloses the percent of the Company’s revenue generated from fixed price contracts:

	Three Months Ended						Nine Months Ended
	October 2, 2020			September 27, 2019			October 2, 2020			September 27, 2019
Engineering & other scientific		21	%		14	%		17	%		14	%
Environmental and health		1	%		1	%		1	%		1	%
Total fixed price revenues		22	%		15	%		18	%		15	%