The Company and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Net losses	$ (7,043,000)	$ (6,754,000)	$ (5,430,000)	$ (4,157,000)	$ (13,797,000)	$ (9,586,000)	$ (10,800,000)
Accumulated deficit	$ 130,996,000				$ 130,996,000		117,199,000
Maximum specific allowance as percentage of invoice value for problematic customer balances	100.00%				100.00%
Allowance for doubtful accounts receivable	$ 0				$ 0		$ 61,000
Scientific research and experimental development cost tax credit eligible percentage					15.00%
Amortization	500,000		$ 0		$ 1,000,000.0	0
Inventory write-downs					$ 160,000	37,000
Accounting Standards Update [Extensible List]								us-gaap:AccountingStandardsUpdate201602Member
Lease, Practical Expedients, Package								true
Payment terms					The Company sells its products both directly to customers and through distributors generally under agreements with payment terms typically 60 days or less.
Deferred revenue, revenue recognized					$ 61,000
Period payments due from customers					60 days
Revenue, practical expedient, financing component					true
Payroll subsidies						861,352
Rent subsidies						$ 160,865
Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of long-lived assets					3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of long-lived assets					10 years
Scientific Research And Experimental Development
Summary Of Significant Accounting Policies [Line Items]
Unused tax credits carried back period					3 years
Unused tax credits forward period					20 years
Developed Technology Rights
Summary Of Significant Accounting Policies [Line Items]
Amortization	300,000				$ 700,000
Developed Technology Rights | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of long-lived assets					4 years
Customer Relationships
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of long-lived assets					4 years
Amortization	$ 200,000				$ 300,000