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Note 13 - Variable Interest Entities ("VIE") and Transactions - Condensed Balance Sheet (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current Assets | $ 32,291,485 | $ 34,959,390
Property, plant and equipment, net | 4,556,581 | 5,311,388
Total assets | 39,984,038 | 43,913,739
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] |  |
Current Assets | 608,000 | 794,000
Property, plant and equipment, net | 231,000 | 125,000
Other noncurrent assets | 740,000 | 794,000
Total assets | 1,579,000 | 1,713,000
Mortgages and other long-term debt payable | 2,062,000 | 1,962,000
Total liabilities | $ 2,062,000 | $ 1,962,000

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