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v3.20.4

Note 7 - Long-term Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Debt [Table Text Block] |
|  |  |  |  |  |  |  | Applicable |
|  |  |  |  |  |  |  | Spread Rates for |
|  |  |  | Applicable Spread Rates |  |  | Domestic Rate |
|  | Average Excess Revolver Availability |  | for Eurodollar Rate |  |  | Revolving |
Revolver Pricing Level |  | for Previous Quarter |  | Revolving Advances |  |  | Advances |
I |  | $25,000,000+ |  |  | 1.00 | % |  |  | 0.50 | %
II |  | $17,500,000 to < 25,000,000 |  |  | 1.25 | % |  |  | 0.50 | %
III |  | $10,000,000 to < 17,500,000 |  |  | 1.50 | % |  |  | 2.50 | %
IV |  | $< 10,000,000 |  |  | 1.75 | % |  |  | 0.00 | %

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration