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Note 13 - Income Tax (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Percent, Total | (105.70%) | (7.10%)
Deferred Tax Assets, Valuation Allowance, Total | $ 14,700 | $ 16,682
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | (2,000) | 2,900
Research and Development Tax Credit Carryforwards Offset by Reserve for Uncertain Tax Positions | 1,000 |
Deferred Tax Assets, Tax Credit Carryforwards, Total | 2,900 |
Cash and Cash Equivalents, at Carrying Value, Ending Balance | 7,821 | 8,317
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 1,300 |
Tax Cuts and Jobs Act, Change in Tax Rate Operating Loss Carryforwards From Acquisition, CARES Act | 5,300 |
Deferred Tax Assets, Valuation Allowance, Increase (Decrease) Due to Change in Tax Rate Operating Loss Carryforward From Acquisition CARES Act | 1,100 |
Non-US [Member] | Subsidiaries [Member] |  |
Cash and Cash Equivalents, at Carrying Value, Ending Balance | 2,800 | 2,500
Expire in 2022 [Member] |  |
Deferred Tax Assets, Tax Credit Carryforwards, Research | 8,400 |
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | $ 200 |
Domestic Tax Authority [Member] |  |
Open Tax Year | 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |
Operating Loss Carryforwards, Total | $ 22,700 |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Expire between 2029 and 2037 [Member] |  |
Operating Loss Carryforwards, Total | 22,600 |
State and Local Jurisdiction [Member] | Expire between 2022 and 2041 [Member] |  |
Operating Loss Carryforwards, Total | 16,400 |
Foreign Tax Authority [Member] |  |
Operating Loss Carryforwards, Total | $ 9,900 |
Open Tax Year | 2017 2018 2019 2020 2021 |
UK Pension Liability [Member] |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ (900) |
UK Pension Asset [Member] |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | $ 700

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- Definition Amount of net operating loss carryforward from an acquisition after the change in tax rate pursuant to Tax Cuts and Jobs Act under the CARES Act. + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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