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10. Financial instruments (Details) - ARS ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost		$ 8,774,344
Financial assets at fair value through profit or loss	$ 3,381,550	4,366,675
Non-financial assets		20,448
Financial instruments		13,161,467
Trade receivables
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost	7,587,906	8,385,237
Financial assets at fair value through profit or loss	0	0
Non-financial assets	0	0
Financial instruments	7,587,906	8,385,237
Other receivables
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost	954,407	249,780
Financial assets at fair value through profit or loss	0	88,667
Non-financial assets	88,451	20,448
Financial instruments	1,042,858	358,895
Cash and banks
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost	27,608	120,053
Financial assets at fair value through profit or loss	0	0
Non-financial assets	0	0
Financial instruments	27,608	120,053
Checks to be deposited
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost		2,296
Financial assets at fair value through profit or loss		0
Non-financial assets		0
Financial instruments		2,296
Government bonds - fair value
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost	0	0
Financial assets at fair value through profit or loss	3,285,799	1,829,888
Non-financial assets	0	0
Financial instruments	3,285,799	1,829,888
Derivative financial instruments
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost	0	0
Financial assets at fair value through profit or loss	0	2,448,120
Non-financial assets	0	0
Financial instruments	0	2,448,120
Money market funds
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost	0
Financial assets at fair value through profit or loss	95,751
Non-financial assets	0
Financial instruments	$ 95,751
Government bonds - amortized cost
SummaryOfFinancialInstrumentsLineItems [Line Items]
Financial assets at amortized cost		16,978
Financial assets at fair value through profit or loss		0
Non-financial assets		0
Financial instruments		$ 16,978

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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