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Cost of sales, without considering depreciation and amortization (Details 1) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of cost of sales [Line Items] |  |  |
Other production expenses | $ 13,595 | $ 15,028 | $ 24,107,000
Cost of sales of services, without considering depreciation and amortization | (4,318) | (12,954) | (10,754)
cost of services [Member] |  |  |
Disclosure of cost of sales [Line Items] |  |  |
Direct labor | 2,128 | 7,398 | 5,983
Consumption of materials and supplies | 675 | 1,026 | 868
Maintenance and repair | 543 | 946 | 217
Services provided by third parties | 382 | 1,782 | 1,689
Electricity and water | 249 | 586 | 633
Rentals | 92 | 423 | 480
Insurances | 86 | 246 | 212
Transport | 50 | 98 | 213
Other production expenses | 113 | 449 | 459
Cost of sales of services, without considering depreciation and amortization | $ 4,318 | $ 12,954 | $ 10,754

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