Details of Certain Financial Statement Components - Intangible assets, net and Future amortization over next five years (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Intangible assets, net
Total intangible assets, gross	$ 1,012,000		$ 1,012,000		$ 658,000
Less: accumulated amortization	(688,000)		(688,000)		(582,000)
Total intangible assets, net	324,000		324,000		76,000
Amortization expense	94,000	$ 13,000	106,000	$ 28,000
Years ending December 31,
2023 (remainder of year)	70,000		70,000
2024	125,000		125,000
2025	48,000		48,000
2026	27,000		27,000
2027	25,000		25,000
Thereafter	29,000		29,000
Total intangible assets, net	324,000		324,000		76,000
Patents, tradenames, and trademarks
Intangible assets, net
Total intangible assets, gross	705,000		705,000		$ 658,000
Developed technology
Intangible assets, net
Total intangible assets, gross	134,000		134,000
Customer relationships
Intangible assets, net
Total intangible assets, gross	96,000		96,000
Non-compete agreements
Intangible assets, net
Total intangible assets, gross	26,000		26,000
Order backlog
Intangible assets, net
Total intangible assets, gross	22,000		22,000
In-process research and development
Intangible assets, net
Total intangible assets, gross	$ 29,000		$ 29,000