SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Translation of amounts from THB into U.S. dollars (Details)	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Income statement and cash flows items [Member]
Foreign Currency Exchange Rate, Translation	30.3093		31.2785
Balance Sheet Items, Except For Equity Accounts [Member]
Foreign Currency Exchange Rate, Translation	31.2500	30.0200

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant