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Robert Gregory Partners, LLC Acquisition (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
May 15, 2017
May 31, 2017
May 28, 2016
May 31, 2017
May 28, 2016
Dec. 31, 2016
Operating Income (Loss)   $ (6,491) $ (1,258) $ (16,353) $ 241  
Robert Gregory Partners, LLC [Member]            
Purchase price in cash $ 3,500          
Potential contingent consideration 4,500          
Revenues           $ 3,300
Operating Income (Loss)           $ 1,100
Current contingent earn out liability (accrued liabilities) 500          
Acquisition costs $ 100