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Other Assets (Tables)
 12 Months Ended
Dec. 31, 2015
Other Assets [Abstract]  
Schedule of Other Assets
December 31,   2015     2014  
             
Patents, at cost   $ 6,322     $ 6,113  
Accumulated amortization     (3,629 )     (3,364 )
Deposits on capital items     16,839       19,011  
Software development costs, at cost     2,057       2,057  
Accumulated amortization     (1,792 )     (1,381 )
Other     2,994       3,111  
    $ 22,791     $ 25,547