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Note 6 - Revenues - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Balance | $ 585 | $ 602
Unbilled | 1,997 | 2,143
Billings | (2,004) | (2,160)
Balance | 578 | 585
Balance | 3,200 |
Billings | 2,004 | 2,160
Balance | 3,400 | 3,200
Deferred Membership Dues [Member] |  |
Billings | (6,864) | (6,111)
Balance | 3,196 | 3,153
Billings | 6,864 | 6,111
Revenue recognized | (6,697) | (6,068)
Balance | 3,363 | 3,196
Customer Advance Deposits [Member] |  |
Billings | (1,953) | (917)
Balance | 674 | 553
Billings | 1,953 | 917
Revenue recognized | (1,832) | (796)
Balance | $ 795 | $ 674

X
- Definition The amount of membership dues received, but not yet billed, during the period. + References No definition available. + Details
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Balance Type: | debit
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X
- Definition The amount of billings of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References No definition available. + Details
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X
- Definition The amount of revenue recognized excluding the opening balance of contract with customer liability. + References No definition available. + Details
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Balance Type: | credit
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X
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130533-203044 + Details
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X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + 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 http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 + Details
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X
- Details
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Period Type: |

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- Details
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Balance Type: |
Period Type: |