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7. OPERATING LEASES
12 Months Ended
Dec. 31, 2013
Leases, Operating [Abstract]  
Operating Leases of Lessee Disclosure [Table Text Block]
7. OPERATING LEASES

We lease certain machinery, trucks, and facilities under operating leases that generally provide for renewal options. We incurred approximately $840,000, $1,067,000 and $1,583,000 in rent expense under operating lease arrangements for 2013, 2012 and 2011, respectively.


Future minimum lease payments under non-cancelable operating leases are approximately as follows for the years ended December 31:


2014   $ 1,091,797  
2015     469,958  
2016     397,369  
2017     399,359  
2018     98,526  
Total   $ 2,457,009