Summarized Financial Information Related to Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Net revenues	$ 5,330			$ 7,376			$ 18,994	$ 23,348
Cost of revenues	2,672			3,334			8,566	10,074
Gross profit	2,658			4,042			10,428	13,274
Operating expenses	5,239			6,152			16,141	16,529
Operating loss	(2,581)			(2,110)			(5,713)	(3,255)
Interest expense	18			(365)			(159)	(947)
Income/(loss) before taxes	(2,609)			(2,455)			(6,577)	(2,128)
Tax provision/(benefit)	(341)			(1,255)			(1,540)	(1,390)
Net income from discontinued operations, net of tax	87			1,013			11,695	1,854
Net income/(loss)	(2,181)	$ (1,360)	$ 10,197	(187)	$ 1,537	$ (233)	6,658	1,116
Depreciation and Amortization							1,081	1,604
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	5,330			7,376			18,994	23,348
Cost of revenues	2,672			3,334			8,566	10,074
Gross profit	2,658			4,042			10,428	13,274
Operating expenses	3,205			3,542			10,101	10,645
Segment profitability	(547)			500			327	2,629
Corporate expenses	2,034			2,610			6,040	5,884
Operating loss	(2,581)			(2,110)			(5,713)	(3,255)
Other income/(expense)	(46)			20			(705)	2,074
Interest expense	18			(365)			(159)	(947)
Income/(loss) before taxes	(2,609)			(2,455)			(6,577)	(2,128)
Tax provision/(benefit)	(341)			(1,255)			(1,540)	(1,390)
Net income/(loss) from continuing operations	(2,268)			(1,200)			(5,037)	(738)
Net income from discontinued operations, net of tax	87			1,013			11,695	1,854
Net income/(loss)	(2,181)			(187)			6,658	1,116
Depreciation and Amortization	330			474			1,081	1,418
Test and Measurement [Member]
Segment Reporting Information [Line Items]
Net revenues	4,080			5,931			15,628	16,779
Cost of revenues	1,948			2,564			6,817	7,089
Gross profit	2,132			3,367			8,811	9,690
Operating expenses	1,787			1,858			5,645	5,338
Segment profitability	345			1,509			3,166	4,352
Depreciation and Amortization	260			225			794	676
Radio Baseband and Software [Member]
Segment Reporting Information [Line Items]
Net revenues	1,250			1,445			3,366	6,569
Cost of revenues	724			770			1,749	2,985
Gross profit	526			675			1,617	3,584
Operating expenses	1,418			1,684			4,456	5,307
Segment profitability	(892)			(1,009)			(2,839)	(1,723)
Depreciation and Amortization	$ 70			$ 249			$ 287	$ 742