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Trade and other payables	12 Months Ended
	Dec. 31, 2021
Trade and other payables [Abstract]
Trade and other payables	11. Trade and other payables: Trade and other payables include balances of suppliers and consulting service providers.  Other payables includes $1.2 million for executive severance at December 31, 2021.

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- Definition

The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period.

+ References

Reference 1: 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(a),20,24)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration