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Note 1 - Significant Accounting Policies - Summary of Receivables (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Receivables | $ 3,286 | $ 8,243
Billed Revenues [Member] |  |
Receivables | 200 | 2,816
Unbilled Revenues [Member] |  |
Receivables | 3,086 | 5,427
US Department of Health and Human Services [Member] |  |
Receivables | 3,086 | 5,402
US Department of Health and Human Services [Member] | Billed Revenues [Member] |  |
Receivables | 0 | 0
US Department of Health and Human Services [Member] | Unbilled Revenues [Member] |  |
Receivables | 3,086 | 5,402
Royalty Receivables from Partners [Member] |  |
Receivables | 200 | 2,841
Royalty Receivables from Partners [Member] | Billed Revenues [Member] |  |
Receivables | 200 | 2,816
Royalty Receivables from Partners [Member] | Unbilled Revenues [Member] |  |
Receivables | $ 0 | $ 25

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- Definition The total amount due to (from) the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable (payable), notes and loans receivable (payable), as well as any other types of receivables (payables), net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References No definition available. + Details
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- Definition The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-06(3)) -URI http://asc.fasb.org/extlink&oid=120401414&loc=d3e604059-122996 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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