Summary of changes in operating assets and liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Notes and other explanatory information [abstract]
Trade and other receivables	$ (1,009)	$ 1,101
Inventory	135	242
Prepaid expenses and other current assets	166	159
Accounts payable and accrued liabilities	(415)	238
Deferred revenues	(9)	3
Provision for restructuring and other costs	(194)	(290)
Employee future benefits	(93)	(126)
Increase (decrease) in operating assets and liabilities	$ (1,419)	$ 1,327

Adjustments for decrease increase in current prepayments and other current assets

No definition available.

Name:	CSCI_AdjustmentsForDecreaseIncreaseInCurrentPrepaymentsAndOtherCurrentAssets
Namespace Prefix:	CSCI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Adjustments for increase decrease in provisions.

+ References

No definition available.

+ Details

Name:	CSCI_AdjustmentsForIncreaseDecreaseInProvisions
Namespace Prefix:	CSCI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 20
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_20_a&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_AdjustmentsForDecreaseIncreaseInInventories
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Adjustments for decrease (increase) in trade and other receivables to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Trade and other receivables; Profit (loss)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 20
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_20&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Adjustments for the increase (decrease) in deferred income including contract liabilities to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Deferred income including contract liabilities; Profit (loss)]

+ References

+ Details

Name:	ifrs-full_AdjustmentsForIncreaseDecreaseInDeferredIncomeIncludingContractLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Adjustments for increase (decrease) in employee benefit liabilities to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)]

+ References

+ Details

Name:	ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Adjustments for increase (decrease) in trade and other payables to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Trade and other payables; Profit (loss)]

+ References

+ Details

Name:	ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase (decrease) in working capital.

+ References

+ Details

Name:	ifrs-full_IncreaseDecreaseInWorkingCapital
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	ifrs-full_NotesAndOtherExplanatoryInformationAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration