Note 5 - Intangible Assets - Expected Future Amortization Expense (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Expected amortization expense, 2020	$ 215
Expected amortization expense, 2021	215
Expected amortization expense, 2022	215
Expected amortization expense, 2023	183
Expected amortization expense, 2024
Customer Relationships [Member]
Expected amortization expense, 2020	125
Expected amortization expense, 2021	125
Expected amortization expense, 2022	125
Expected amortization expense, 2023	104
Expected amortization expense, 2024
Intellectual Property [Member]
Expected amortization expense, 2020	90
Expected amortization expense, 2021	90
Expected amortization expense, 2022	90
Expected amortization expense, 2023	79
Expected amortization expense, 2024

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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