Note 4 - Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three months ended				Nine months ended
	September 30,				September 30,
	2021		2020		2021		2020
Display products	$	936	$	834	$	2,758	$	2,211
Telecommunication products		1,131		909		3,143		2,587
Specialty glass products		556		570		1,490		1,339
Environmental substrate and filter products		382		369		1,233		891
Life science products		304		220		917		707
All Other (1)		306		99		865		218
Total revenue	$	3,615	$	3,001	$	10,406	$	7,953
Impact of foreign currency movements (2)		24		6				66
Cumulative adjustment related to customer contract (3)								105
Net sales of reportable segments and All Other	$	3,639	$	3,007	$	10,406	$	8,124