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Note 3 - Income Taxes - Income Tax Rate Reconciliation (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Provision at the U.S. federal statutory rate | 21.00% | 21.00%
State taxes, net of federal benefit | 3.10% | (15.50%)
Foreign tax rate differential | 0.40% | (30.20%)
Valuation allowance | (48.80%) | (1504.60%)
Chile outside basis differential | 0.40% | 34.40%
PPP Loan Forgiveness | 0.00% | (484.60%)
Accrual to return | 3.10% | (329.30%)
Research and development credit | 5.90% | (144.90%)
State rate change | 9.50% | (124.00%)
China deferred adjustment | 0.00% | 1006.00%
China enterprise tax | 0.00% | 0.00%
Share based compensation | 3.30% | 1590.30%
Other true up | 0.00% | 0.00%
Intangible assets impairment and other non-deductibles | 0.00% | 0.00%
Other | (1.80%) | 2.00%
Income tax (expense) benefit effective rate | (3.90%) | 20.60%

X
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to China Enterprise Tax. + References No definition available. + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to outside basis differential. + References No definition available. + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 + Details
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