XML 77 R58.htm IDEA: XBRL DOCUMENT v3.23.1

Concentration on Revenues and Cost of Goods Sold (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Accounts Receivable [Member]
Concentration on Revenues and Cost of Goods Sold (Details) [Line Items]
Concentration risk, percentage	40.72%	39.36%
Supplier Concentration Risk [Member]
Concentration on Revenues and Cost of Goods Sold (Details) [Line Items]
Concentration risk, percentage	10.00%	10.00%

X

- Definition

ConcentrationRiskPercentage.

+ References

No definition available.

+ Details

Name:	gtec_ConcentrationRiskPercntage
Namespace Prefix:	gtec_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	gtec_ConcentrationonRevenuesandCostofGoodsSoldDetailsLineItems
Namespace Prefix:	gtec_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SupplierConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: