Note 5 - Revenue (Details Textual) - USD ($) |
3 Months Ended | |
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Mar. 31, 2022 |
Mar. 31, 2021 |
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Revenue from Contract with Customer, Including Assessed Tax | $ 85,000 | $ 506,000 |
Income Tax Expense (Benefit), Total | $ 20,000 | 38,000 |
Foreign Tax Authority [Member] | National Tax Agency, Japan [Member] | ||
Royalty Withholding Tax | 5.00% | |
Income Tax Expense (Benefit), Total | $ 4,000 | 25,000 |
Royalty [Member] | Daiichi Sankyo Collaberation and License Agreement [Member] | ||
Royalty Percentage | 4.00% | |
Revenue from Contract with Customer, Including Assessed Tax | $ 0 | 0 |
Non Cash Royalty Revenue [Member] | ||
Revenue from Contract with Customer, Including Assessed Tax | 85,000 | 493,000 |
Non Cash Royalty Revenue [Member] | Daiichi Sankyo Collaberation and License Agreement [Member] | ||
Revenue from Contract with Customer, Including Assessed Tax | $ 85,000 | $ 493,000 |
X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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X | ||||||||||
- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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X | ||||||||||
- Definition Royalty percentage received on net sales. No definition available.
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X | ||||||||||
- Definition Percentage of tax withheld from royalty income. No definition available.
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