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Note 7 - Other Comprehensive Income	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	Note 7 - Other Comprehensive Income In the three months ended March 31, 2021 and 2020, the Company incurred other comprehensive income (loss) of approximately $32,000 and ( $1,364,000 ), respectively, from foreign currency translation adjustments.  The main contributing factor for the large other comprehensive loss in the three months ended March 31, 2020 was the sudden 25% decline in the valuation of the Mexican peso related to the COVID- 19 pandemic and the resulting large-scale, rapid impacts to the world economy.  The Mexican peso has since generally stabilized which has afforded the Company a small income for three months ended March 31, 2021.

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- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

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