Percentage of valuation allowance recognized.

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Period in which tax credit carryforwards expire in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

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- Definition

Amount of underpayment of taxes leads to extension of statue of limitation.

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No definition available.

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- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates.

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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- Definition

Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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INCOME TAXES (Details)	12 Months Ended
INCOME TAXES (Details)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Income Tax Contingency
Net reduction of unrecognized tax benefits	$ 78,000		$ 390,000	$ 49,000
Percentage of valuation allowance recognized	100.00%	100.00%
Net deferred tax assets	$ 0
Income tax, interest or penalties	0
Unrecognized tax benefits	$ 480,000		$ 558,000	$ 948,000	$ 997,000
Federal statutory rate (as a percent)	21.00%	21.00%	21.00%	21.00%
Minimum
Income Tax Contingency
Underpayment of taxes, statue of limitation extended term	$ 15,000	¥ 100,000
China
Income Tax Contingency
Federal statutory rate (as a percent)	25.00%	25.00%
Hong Kong
Income Tax Contingency
Federal statutory rate (as a percent)	8.25%	8.25%
United States
Income Tax Contingency
Operating loss carryforwards	$ 183,600,000
China
Income Tax Contingency
Operating loss carryforwards	62,600,000
Hong Kong
Income Tax Contingency
Operating loss carryforwards not subject to expiration	4,700,000
Research Tax Credit Carryforward
Income Tax Contingency
Net reduction of unrecognized tax benefits	78,000
Operating loss carryforwards, tax	$ 1,200,000
Expiration period for unused tax carryforwards	20 years	20 years
Unrecognized tax benefits	$ 500,000