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Note S - Other	12 Months Ended
Dec. 31, 2020
Notes to Financial Statements
Other Disclosure [Text Block]	S. OTHER The Company has entered into a licensing agreement with another firm that holds intellectual property on the Rusoh® self-service/self-reloadable fire extinguisher. Under the agreement, the Company has advanced the entity funds and has agreed to pay royalties to the entity on the commercial sales of the developed products. As of December 31, 2020 and 2019, notes receivable plus accrued interest of $7,399,000 and $7,182,000, respectively, related to the license agreement were classified as non-current Notes Receivable on the Company’s Consolidated Balance Sheets. The fire extinguisher was introduced to the commercial market in 2017, and the Company believes the amount of the notes is recoverable through royalties earned on future sales of the developed products.

Note S - Other

12 Months Ended

Dec. 31, 2020

S. OTHER

The Company has entered into a licensing agreement with another firm that holds intellectual property on the Rusoh® self-service/self-reloadable fire extinguisher. Under the agreement, the Company has advanced the entity funds and has agreed to pay royalties to the entity on the commercial sales of the developed products. As of December 31, 2020 and 2019, notes receivable plus accrued interest of $7,399,000 and $7,182,000, respectively, related to the license agreement were classified as non-current Notes Receivable on the Company’s Consolidated Balance Sheets. The fire extinguisher was introduced to the commercial market in 2017, and the Company believes the amount of the notes is recoverable through royalties earned on future sales of the developed products.