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Notes Payable (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Total notes payable $ 7,539 $ 7,959
Less current maturities 840 840
Total long-term portion 6,699 7,119
Variable rate bank notes due May 31, 2018 [Member]    
Total notes payable 3,592 3,846
Variable rate bank notes due May 31, 2019 [Member]    
Total notes payable $ 3,947 $ 4,113