Note 1 - Summary of Significant Interim Accounting Policies - Disaggregation of Net Sales by Major Source (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net sales	$ 73,087,000	$ 60,987,000
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	69,358,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	3,729,000
Uniforms and Related Products [Member]
Net sales	48,125,000
Uniforms and Related Products [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	45,125,000
Uniforms and Related Products [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	3,000,000
Remote Staffing Solutions [Member]
Net sales	6,286,000
Remote Staffing Solutions [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	6,286,000
Remote Staffing Solutions [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales
Promotional Products [Member]
Net sales	18,676,000
Promotional Products [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Net sales	17,947,000
Promotional Products [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net sales	$ 729,000