XML 195 R181.htm IDEA: XBRL DOCUMENT v3.8.0.1
Cost of sales, without considering depreciation and amortization (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of cost of sales [Line Items]      
Other production expenses $ 15,028 $ 24,107 $ 26,739
Cost of sales of services, without considering depreciation and amortization (12,954) (10,754) (59,612)
cost of services [Member]      
Disclosure of cost of sales [Line Items]      
Direct labor 7,398 5,983 18,314
Services provided by third parties 1,782 1,689 16,247
Consumption of materials and supplies 1,026 868 7,865
Electricity and water 586 633 7,134
Maintenance and repair 946 217 637
Rentals 423 480 2,544
Insurances 246 212 1,233
Transport 98 213 3,868
Other production expenses 449 459 1,770
Cost of sales of services, without considering depreciation and amortization $ 12,954 $ 10,754 $ 59,612