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Note 5 - Lease Obligations and Other Contingencies (Details Textual) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | $ 238,000 | $ 1,126,000
Operating Lease, Weighted Average Remaining Lease Term | 13 years 109 days |  |  |
Operating Lease, Weighted Average Discount Rate, Percent | 12.70% |  |  |
Operating Lease, Expense | $ 1,464,000 |  |  |
Operating Lease, Payments | 1,457,000 |  |  |
Operating Lease, Right-of-Use Asset, Accumulated Amortization | 1,386 |  |  |
Accrued Liabilities, Current [Member] |  |  |  |
Operating Lease, Liability, Current | 1,377,000 |  |  |
Other Noncurrent Liabilities [Member] |  |  |  |
Operating Lease, Liability, Noncurrent | 3,406,000 |  |  |
Other Noncurrent Assets [Member] |  |  |  |
Operating Lease, Right-of-Use Asset | $ 3,590,000 |  |  |
Minimum [Member] |  |  |  |
Lessee, Operating Lease, Term of Contract | 1 year |  |  |
Maximum [Member] |  |  |  |
Lessee, Operating Lease, Term of Contract | 5 years |  |  |
Retained Earnings [Member] |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | $ 238,000 | $ 1,126,000
Accounting Standards Update 2016-02 [Member] |  |  |  |
Operating Lease, Right-of-Use Asset |  | $ 3,621,000 |  |
Operating Lease, Liability, Total |  | 4,822,000 |  |
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member] |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  | $ 238,000 |  |

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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=77888426&loc=SL77918673-209980 + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Weighted average remaining lease term for 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/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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