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Note 7 - Equity Investments in Unconsolidated Affiliate (Details Textual) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) ft² | Dec. 31, 2019 USD ($) | Dec. 31, 2005
Expense To Acquire Inventory | $ 18,623,000 | $ 19,312,000 |
Income (Loss) from Equity Method Investments, Total | 710,000 | 359,000 |
Proceeds from Sale of Productive Assets, Total | $ 1,087,000 | $ 1,332,000 |
INDIA | Harmony [Member] |  |  |
Number of Stores | 4 |  |
Number Of Stores Owned | 3 |  |
Number Of Stores Rented | 1 |  |
INDIA | Harmony [Member] | Manufacturing Building Products [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² | 113,000 |  |
INDIA | Harmony [Member] | Manufacturing Coated Material and Sewing Proprietary Disposable Protective Apparel [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² | 73,000 |  |
INDIA | Harmony [Member] | Sewing Proprietary Disposable Protective Apparel [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² | 16,000 |  |
INDIA | Harmony [Member] | Manufacturing Of Building Products [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² | 93,000 |  |
Harmony [Member] |  |  |
Equity Method Investment, Other than Temporary Impairment | $ 0 |  |
Equity Method Investments | 5,549,000 |  |
Equity Method Investment, Aggregate Cost | 1,450,000 |  |
Cumulative Equity In Income Of Unconsolidated Affiliate | 5,118,000 |  |
Proceeds from Equity Method Investment, Distribution, Return of Capital | 942,000 |  |
Proceeds from Equity Method Investment, Distribution | $ 77,000 |  |
Harmony [Member] | Alpha Pro Tech Engineered Products [Member] |  |  |
Equity Method Investment, Ownership Percentage |  |  | 41.66%
Harmony [Member] | Maple Industries and Associates [Member] |  |  |
Equity Method Investment, Ownership Percentage |  |  | 58.34%

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