Note 1 - Summary of Significant Interim Accounting Policies - Disaggregation of Net Sales by Major Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net sales	$ 95,870	$ 67,773	$ 251,349	$ 194,365
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	92,945		247,634
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	2,925		3,715
Uniforms and Related Products [Member]
Net sales	69,776		174,304
Uniforms and Related Products [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	66,610		171,736
Uniforms and Related Products [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	3,166		2,568
Remote Staffing Solutions [Member]
Net sales	6,908		20,169
Remote Staffing Solutions [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	6,908		20,169
Remote Staffing Solutions [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales
Promotional Products [Member]
Net sales	19,186		56,876
Promotional Products [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	19,427		55,729
Promotional Products [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	$ (241)		$ 1,147