XML 79 R55.htm IDEA: XBRL DOCUMENT v3.19.1
16. Cash and cash equivalents (Tables)
 12 Months Ended
Dec. 31, 2018
Cash And Cash Equivalents Tables Abstract  
Cash and cash equivalents
     12.31.18     12.31.17 
Cash and banks                       27,608                     122,349
Total cash and cash equivalents                       27,608                     122,349