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, 2019 [Member]
Total notes payable	3,947	4,113
Variable rate bank notes due May 31, 2018 [Member]
Total notes payable	$ 3,592	$ 3,846