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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 |

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