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Cash and cash equivalents (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents.
Cash	R$ 2		R$ 7
Bank account	3,407		6,546
Financial investments	92,455		39,212
Cash and cash equivalents	R$ 95,864	[1]	R$ 45,765	[1]	R$ 309,893	R$ 311,156
Average gross yield of deposits	104.00%		103.00%
[1] The Company invests in short-term fixed income investment funds with daily liquidity and no material risk of change in value. Financial investments presented an average gross yield of 104% of the annual CDI rate on December 31, 2023 (103% on December 31, 2022). All investments are highly liquid investments that are readily convertible to known amounts of cash and which are subject to an insignificant risk of changes in value and correspond to the cash obligations for the period.

X

- Definition

The amount of cash balances held at banks.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2022-03-24
-Paragraph 45
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X

- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2022-03-24
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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- References

No definition available.

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X

- Definition

The amount of cash held by the entity. This does not include demand deposits.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2022-03-24
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard
-URIDate 2022-03-24

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X

- Definition

A classification of cash equivalents representing short-term investments. [Refer: Cash equivalents]

+ References

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-IssueDate 2022-03-24
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- Definition

The percentage of average gross yield of deposits.

+ References

No definition available.

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