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Note 1 - Nature of Business | 12 Months Ended
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Dec. 31, 2020
Notes to Financial Statements |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | 1. Nature of Business Nature of Operations Yunhong CTI Ltd. (formerly CTI Industries Corporation), its former United Kingdom subsidiary (CTI Balloons Limited), its Mexican subsidiary (Flexo Universal, S. de R.L. de C.V.), its German subsidiary (CTI Europe GmbH) and CTI Supply, Inc. (collectively, the “Company”) (i) design, manufacture and distribute metalized and latex balloon products throughout the world and (ii) operate systems for the production, lamination, coating and printing of films used for food packaging and other commercial uses and for conversion of films to flexible packaging containers and other products. As discussed in Note 23 Discontinued Operations, effective in 2019, the Company determined that it was exiting CTI Balloons Limited and CTI Europe. Accordingly, the operations of these entities are classified as discontinued operations in these financial statements.

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