Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Cash and Cash Equivalents
Cash and cash equivalents	$ 5,632	$ 13,468
CHINA
Cash and Cash Equivalents
Cash and cash equivalents	4,000
HONG KONG
Cash and Cash Equivalents
Cash and cash equivalents	100
UNITED STATES
Cash and Cash Equivalents
Cash and cash equivalents	$ 1,500