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Note 2 - Revenue (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three months ended								Six months ended
		June 30,								June 30,
		2023				2022				2023				2022
Telecommunication products		$	1,066			$	1,313			$	2,191			$	2,511
Display products			725				759				1,334				1,665
Specialty glass products			420				485				824				978
Environmental substrate and filter products			433				336				840				737
Life science products			222				304				469				611
Polycrystalline silicon products			258				306				535				588
All other products			119				112				228				205
Total revenue		$	3,243			$	3,615			$	6,421			$	7,295

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-5

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- References

No definition available.

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