Note 1 - Basis of Presentation	9 Months Ended
Sep. 30, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1 - Basis of Presentation The accompanying condensed (a) consolidated balance sheet as of September 30, 2021 and (b) the unaudited interim condensed consolidated financial statements have been prepared and, in the opinion of management, contain all the adjustments (consisting of those of a normal recurring nature) considered necessary to present fairly the consolidated financial position and the consolidated statements of comprehensive income and consolidated cash flows for the periods presented in conformity with generally accepted accounting principles for interim consolidated financial information and the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by accounting principles generally accepted in the United States of America. Operating results for the three and nine months ended September 30, 2021 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2021. It is suggested that these condensed consolidated financial statements be read in conjunction with the consolidated financial statements and notes thereto included in the Company's annual report on Form 10-K for the fiscal year ended December 31, 2020. Principles of consolidation and nature of operations: Yunhong CTI Ltd., its Mexican subsidiary (Flexo Universal, S. de R.L. de C.V.) (“Flexo Universal”), its German subsidiary (CTI Europe GmbH) (“CTI Europe”) and its subsidiary 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 2 Discontinued Operations, effective in the third quarter of 2019, the Company determined that it would exit the business formerly conducted by CTI Europe. Accordingly, the operations of that entity are classified as discontinued operations in these financial statements. The entity was fully disposed of in the second quarter of 2021. The condensed consolidated financial statements include the accounts of Yunhong CTI Ltd., and CTI Supply, Inc. and its majority owned subsidiaries, Flexo Universal and CTI Europe, as well as the accounts of Venture Leasing S. A. de R. L. The determination of whether or not to consolidate a variable interest entity under U.S. GAAP requires a significant amount of judgment concerning the degree of control over an entity by its holders of variable interest. To make these judgments, management has conducted an analysis of the relationship of the holders of variable interest to each other, the design of the entity, the expected operations of the entity, which holder of variable interests is most “closely associated” to the entity and which holder of variable interests is the primary beneficiary required to consolidate the entity. Upon the occurrence of certain events, management reviews and reconsiders its previous conclusion regarding the status of an entity as a variable interest entity. Use of estimates: In preparing financial statements in conformity with accounting principles generally accepted in the United States of America, management makes estimates and assumptions that affect the amounts reported of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period in the financial statements and accompanying notes. Actual results may differ from those estimates. The Company’s significant estimates include valuation allowances for doubtful accounts and inventory valuation, and assumptions used as inputs in the Black-Scholes option-pricing model. Earnings per share: Basic income (loss) per share is computed by dividing net income (loss) attributable to Yunhong CTI Ltd shareholders by the weighted average number of shares of common stock outstanding during each period. Diluted income (loss) per share is computed by dividing the net income (loss) attributable to Yunhong CTI Ltd shareholders by the weighted average number of shares of common stock and equivalents (stock options and warrants), unless anti-dilutive, during each period. As of September 30, 2021 and 2020, shares to be issued upon the exercise of options and warrants aggregated nil and 479,802, respectively. As of September 30, 2021, shares to be issued upon the conversion of Series A, Series B, and Series C Preferred Stock was 5,000,000, 1,700,000, and 1,700,000, respectively. For the three and nine months ended September 30, 2021, no assumed conversions were included in the determination of earnings on a diluted basis, as doing so would have been anti-dilutive. Significant Accounting Policies: The Company’s significant accounting policies are summarized in Note 2 of the Company’s consolidated financial statements for the year ended December 31, 2020. There were no significant changes to these accounting policies during the three and nine months ended September 30, 2021. Net sales include revenues from sales of products and shipping and handling charges, net of estimates for product returns. Revenue is measured at the amount of consideration the Company expects to receive in exchange for the transferred products. Revenue is recognized at the point in time when we transfer the promised products to the customer and the customer obtains control over the products. The Company recognizes revenue for shipping and handling charges at the time the goods are shipped to the customer, and the costs of outbound freight are included in cost of sales, as we have elected the practical expedient included in ASC 606. The Company provides for product returns based on historical return rates. While we incur costs for sales commissions to our sales employees and outside agents, we recognize commission costs concurrent with the related revenue, as the amortization period is less than one year and we have elected the practical expedient included in ASC 606. We do not incur incremental costs to obtain contracts with our customers. Our product warranties are assurance-type warranties, which promise the customer that the products are as specified in the contract. Therefore, the product warranties are not a separate performance obligation and are accounted for as described herein. Sales taxes assessed by governmental authorities are accounted for on a net basis and are excluded from net sales.

Note 1 - Basis of Presentation

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Note 1 - Basis of Presentation

The accompanying condensed (a) consolidated balance sheet as of September 30, 2021 and (b) the unaudited interim condensed consolidated financial statements have been prepared and, in the opinion of management, contain all the adjustments (consisting of those of a normal recurring nature) considered necessary to present fairly the consolidated financial position and the consolidated statements of comprehensive income and consolidated cash flows for the periods presented in conformity with generally accepted accounting principles for interim consolidated financial information and the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by accounting principles generally accepted in the United States of America. Operating results for the three and nine months ended September 30, 2021 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2021. It is suggested that these condensed consolidated financial statements be read in conjunction with the consolidated financial statements and notes thereto included in the Company's annual report on Form 10-K for the fiscal year ended December 31, 2020.

Principles of consolidation and nature of operations:

Yunhong CTI Ltd., its Mexican subsidiary (Flexo Universal, S. de R.L. de C.V.) (“Flexo Universal”), its German subsidiary (CTI Europe GmbH) (“CTI Europe”) and its subsidiary 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 2 Discontinued Operations, effective in the third quarter of 2019, the Company determined that it would exit the business formerly conducted by CTI Europe. Accordingly, the operations of that entity are classified as discontinued operations in these financial statements. The entity was fully disposed of in the second quarter of 2021.

The condensed consolidated financial statements include the accounts of Yunhong CTI Ltd., and CTI Supply, Inc. and its majority owned subsidiaries, Flexo Universal and CTI Europe, as well as the accounts of Venture Leasing S. A. de R. L.

The determination of whether or not to consolidate a variable interest entity under U.S. GAAP requires a significant amount of judgment concerning the degree of control over an entity by its holders of variable interest. To make these judgments, management has conducted an analysis of the relationship of the holders of variable interest to each other, the design of the entity, the expected operations of the entity, which holder of variable interests is most “closely associated” to the entity and which holder of variable interests is the primary beneficiary required to consolidate the entity. Upon the occurrence of certain events, management reviews and reconsiders its previous conclusion regarding the status of an entity as a variable interest entity.

Use of estimates:

In preparing financial statements in conformity with accounting principles generally accepted in the United States of America, management makes estimates and assumptions that affect the amounts reported of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period in the financial statements and accompanying notes. Actual results may differ from those estimates. The Company’s significant estimates include valuation allowances for doubtful accounts and inventory valuation, and assumptions used as inputs in the Black-Scholes option-pricing model.

Earnings per share:

Basic income (loss) per share is computed by dividing net income (loss) attributable to Yunhong CTI Ltd shareholders by the weighted average number of shares of common stock outstanding during each period.

Diluted income (loss) per share is computed by dividing the net income (loss) attributable to Yunhong CTI Ltd shareholders by the weighted average number of shares of common stock and equivalents (stock options and warrants), unless anti-dilutive, during each period.

As of September 30, 2021 and 2020, shares to be issued upon the exercise of options and warrants aggregated nil and 479,802, respectively. As of September 30, 2021, shares to be issued upon the conversion of Series A, Series B, and Series C Preferred Stock was 5,000,000, 1,700,000, and 1,700,000, respectively. For the three and nine months ended September 30, 2021, no assumed conversions were included in the determination of earnings on a diluted basis, as doing so would have been anti-dilutive.

Significant Accounting Policies:

The Company’s significant accounting policies are summarized in Note 2 of the Company’s consolidated financial statements for the year ended December 31, 2020. There were no significant changes to these accounting policies during the three and nine months ended September 30, 2021.

Net sales include revenues from sales of products and shipping and handling charges, net of estimates for product returns. Revenue is measured at the amount of consideration the Company expects to receive in exchange for the transferred products. Revenue is recognized at the point in time when we transfer the promised products to the customer and the customer obtains control over the products. The Company recognizes revenue for shipping and handling charges at the time the goods are shipped to the customer, and the costs of outbound freight are included in cost of sales, as we have elected the practical expedient included in ASC 606.

The Company provides for product returns based on historical return rates. While we incur costs for sales commissions to our sales employees and outside agents, we recognize commission costs concurrent with the related revenue, as the amortization period is less than one year and we have elected the practical expedient included in ASC 606. We do not incur incremental costs to obtain contracts with our customers. Our product warranties are assurance-type warranties, which promise the customer that the products are as specified in the contract. Therefore, the product warranties are not a separate performance obligation and are accounted for as described herein. Sales taxes assessed by governmental authorities are accounted for on a net basis and are excluded from net sales.