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Note 1 - Business and Organization (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Equity Ownership Of Subsidiaries [Table Text Block] |
Primary Territory |  | Date Established |  | SGRP Percentage Ownership |  | Principal Office Location
Domestic |  |  |  |  |  |
United States of America |  | 1979 |  | 100% |  | White Plains, New York
National Merchandising Services, LLC |  | 2012 |  | 51% |  | Fayetteville, Georgia
Resource Plus of North Florida, Inc. |  | 2018 |  | 51% |  | Jacksonville, Florida
International |  |  |  |  |  |
Japan |  | May 2001 |  | 100% |  | Tokyo, Japan
Canada |  | June 2003 |  | 100% |  | Vaughan, Ontario, Canada
South Africa |  | April 2004 |  | 51% |  | Durban, South Africa
India |  | April 2004 |  | 51% |  | New Delhi, India
Australia |  | April 2006 |  | 51% |  | Melbourne, Australia
China |  | March 2010 |  | 51% |  | Shanghai, China
Mexico |  | August 2011 |  | 51% |  | Mexico City, Mexico
Turkey |  | November 2011 |  | 51% |  | Istanbul, Turkey
Brazil |  | September 2016 |  | 51% |  | Sao Paulo, Brazil

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- Definition Equity ownership of subsidiaries table text block. + References No definition available. + Details
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Namespace Prefix: | sgrp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration