Note 7 - Selected Balance Sheet Data (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	Raw materials		Work-in process		Finished products and components		Total
September 30, 2021
Domestic	$	14,400	$	690	$	1,490	$	16,580
Foreign		4,562		956		133		5,651
Total	$	18,962	$	1,646	$	1,623	$	22,231
December 31, 2020
Domestic	$	11,371	$	1,499	$	2,149	$	15,019
Foreign		3,393		968		133		4,494
Total	$	14,764	$	2,467	$	2,282	$	19,513

Long-lived Assets by Geographic Areas [Table Text Block]

	September 30,		December 31,
	2021		2020
United States	$	12,480	$	12,539
Singapore		1,247		1,460
Other		157		178
Consolidated	$	13,884	$	14,177

Schedule of Goodwill [Table Text Block]

Carrying amount at December 31, 2020	$	13,714
Purchase accounting adjustment		159
Carrying amount at September 30, 2021	$	13,873

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	September 30, 2021
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer list	$	6,400	$	(1,067	)	$	5,333
Technology intangibles		6,946		(2,764	)		4,182
Total	$	13,346	$	(3,831	)	$	9,515

	December 31, 2020
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer list	$	6,400	$	(467	)	$	5,933
Technology intangibles		6,725		(1,873	)		4,852
Total	$	13,125	$	(2,340	)	$	10,785

Equity Method Investments [Table Text Block]

	September 30,		December 31,
	2021		2020
Investment in Signison	$	279	$	418
Other		259		152
Total	$	538	$	570

Schedule of Accrued Liabilities [Table Text Block]

	September 30, 2021		December 31, 2020
Pension and postretirement benefit obligations	$	188	$	188
Deferred revenue		163		184
Current technology intangible liability		497		1,006
Current earn-out contingent consideration liability		219		1,090
Customer funded projects		775		759
TCPA litigation accrual (Note 11)		1,300		-
Other		1,088		1,008
Total	$	4,230	$	4,235

Other Noncurrent Liabilities [Table Text Block]

	September 30,		December 31,
	2021		2020
Noncurrent technology intangible liability	$	600	$	1,039
Noncurrent earn-out contingent consideration liability		1,914		2,484
Other		900		875
Total	$	3,414	$	4,398