XML 52 R44.htm IDEA: XBRL DOCUMENT v3.23.1

Leases (Details Narrative)	3 Months Ended
Leases (Details Narrative)	Mar. 31, 2023 USD ($)
Leases
Derived rental income	$ 89,419

X

- References

No definition available.

+ Details

Name:	grst_DerivedRentalIncome
Namespace Prefix:	grst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	grst_DisclosureLeasesAbstract
Namespace Prefix:	grst_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration