SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Retirement and other post-retirement benefits (Details) - USD ($)	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Employee benefit expenses	$ 10,073	$ 6,349

Amount of cost (reversal of cost) for pension and other postretirement benefits.

No definition available.

Name:	us-gaap_PensionAndOtherPostretirementBenefitExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration