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Note 10 - Contract Assets and Liabilities 1 (Details Textual) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2020
Contract with Customer, Receivable, after Allowance for Credit Loss, Total | $ 400,000 | $ 300,000 |
Contract with Customer, Liability, Current | 2,796,000 | 217,000 |
License [Member] |  |  |
Contract with Customer, Liability, Noncurrent | 1,600,000 | $ 1,633,000 | $ 2,000,000.0
Contract with Customer, Liability, Revenue Recognized | 33,000 |  |
Deposits held in Escrow for Properties Held for Sale [Member] |  |  |
Contract with Customer, Liability, Current | $ 2,300,000 |  |

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045 + Details
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