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Capital lease obligations (Tables)
12 Months Ended
Dec. 31, 2016
Leases [Abstract]  
Schedule of future minimum lease payments due under capital leases
The minimum lease payments due in each of the next five fiscal years and thereafter are as follows:
2017
 
$
26,353

2018
 
24,385

2019
 
11,396

2020
 
3,281

2021 and thereafter
 

Subtotal:
 
$
65,415

Less: amount representing interest
 
(4,015
)
Carrying amount of minimum lease payments
 
$
61,400

Less: current portion
 
(24,062
)
Long term portion
 
$
37,338