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Note 10 - Related Party Transactions (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Legal Fees	$ 0	$ 72,000
John H Schwan And Stephen M Merrick [Member] | Clever Container [Member]
Ownership Percentage	50.00%
Schwan Incorporated [Member]
Related Party Transaction, Amounts of Transaction	$ 62,000	237,000
Due to Related Parties, Noncurrent, Total	$ 1,373,000	$ 1,102,000

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Portion of the carrying amount as of the balance sheet date of obligations due all related parties that is payable after one year or beyond the normal operating cycle if longer.

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-Publisher FASB
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-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

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-SubTopic 10
-Section S99
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Amount of transactions with related party during the financial reporting period.

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