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Short-term debt - Narrative (Details) |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 11, 2020 USD ($) | Dec. 31, 2019 USD ($) loan | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |
Short-term debt |  | $ 13,296,000 | $ 0 | $ 11,000,000 | $ 158,200,000 | $ 136,000,000
Ratio of net indebtedness to EBITDA |  |  | 7.62 |  |  |
CDI | Banco Bradesco S.A. |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  | 0.67% |  |  |  |
CDI | Banco de la Ciudad de Buenos Aires |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  | 54.00% |  |  |  |
Short-term bank loans |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Number of loans | loan |  | 2 |  |  |  |
Short-term debt |  | $ 10,794,000 | $ 0 |  |  |
Short-term bank loans | Banco Bradesco S.A. |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Short-term debt |  | 7,454,000 |  |  |  |
Short-term bank loans | Banco de la Ciudad de Buenos Aires |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Short-term debt |  | 3,340,000 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Short-term debt |  | 2,500,000 | 0 |  |  |
Minimum aggregate amount of unrestricted cash, cash equivalents and/or marketable securities | $ 50,000,000 |  |  |  |  |
Line of credit, current |  | $ 2,500,000 | $ 0 |  |  |
Revolving Credit Facility | JPMorgan |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing amount | $ 25,000,000 |  |  |  |  |
Revolving Credit Facility | LIBOR | JPMorgan |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) | 3.00% |  |  |  |  |

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- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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