SEGMENTS (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Disaggregation Of Revenue [Line Items]
Total Revenue	$ 48,640	$ 67,320	$ 150,693	$ 214,644
Temporary Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	47,177	63,821	145,150	205,809
Permanent Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	1,463	3,499	5,543	8,835
UNITED STATES [Member] | Commercial Staffing [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	28,708	31,644	79,992	94,280
UNITED STATES [Member] | Commercial Staffing [Member] | Temporary Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	28,537	31,540	79,711	94,079
UNITED STATES [Member] | Commercial Staffing [Member] | Permanent Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	171	104	281	201
UNITED STATES [Member] | Professional Staffing [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	5,188	9,387	19,778	28,449
UNITED STATES [Member] | Professional Staffing [Member] | Temporary Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	4,588	7,434	17,102	23,019
UNITED STATES [Member] | Professional Staffing [Member] | Permanent Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	600	1,953	2,676	5,430
UNITED KINGDOM [Member] | Professional Staffing [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	14,744	26,289	50,923	91,915
UNITED KINGDOM [Member] | Professional Staffing [Member] | Temporary Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	14,052	24,847	48,337	88,711
UNITED KINGDOM [Member] | Professional Staffing [Member] | Permanent Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total Revenue	$ 692	$ 1,442	$ 2,586	$ 3,204