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Note 9 - Leases (Details Textual) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Operating Lease, Liability, Total | $ 2,723 | $ 3,700
Operating Lease, Liability, Noncurrent | 1,599 | 2,380
Operating Lease, Right-of-Use Asset | 3,826 | 5,445
Prepaid Rent | 1,500 |
Other Current Liabilities [Member] |  |
Operating Lease, Liability, Current | $ 1,124 | 1,346
Operating Lease Right of Use Assets [Member] |  |
Prepaid Rent |  | $ 1,800
Minimum [Member] |  |
Lessee, Operating Lease, Term of Contract (Year) | 1 year |
Maximum [Member] |  |
Lessee, Operating Lease, Term of Contract (Year) | 8 years |

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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