Note 1 - Summary of Significant Interim Accounting Policies - Disaggregation of Net Sales by Major Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 82,392	$ 65,604	$ 155,479	$ 126,591
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	85,331		154,689
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	(2,939)		790
Uniforms and Related Products [Member]
Net sales	56,403		104,528
Uniforms and Related Products [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	60,001		105,126
Uniforms and Related Products [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	(3,598)		(598)
Remote Staffing Solutions [Member]
Net sales	6,975		13,261
Remote Staffing Solutions [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	6,975		13,261
Remote Staffing Solutions [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales
Promotional Products [Member]
Net sales	19,014		37,690
Promotional Products [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	18,355		36,302
Promotional Products [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	$ 659		$ 1,388