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Note 10 - Related Party Transactions (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Legal Fees	$ 0	$ 16,000	$ 0	$ 88,000
Clever Container [Member]
Noncontrolling Interest, Ownership Percentage by Parent	28.50%		28.50%
John H Schwan And Stephen M Merrick [Member] | Clever Container [Member]
Ownership Percentage	50.00%		50.00%
Schwan Incorporated [Member]
Related Party Transaction, Amounts of Transaction	$ 1,000	259,000	$ 63,000	442,000
Due to Related Parties, Noncurrent, Total	$ 1,379,000	$ 1,199,000	$ 1,379,000	$ 1,199,000

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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
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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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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