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Significant Customers, Concentrations of Credit Risk, and Geographic Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) segment customer	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) customer
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Number of operating segments | segment	1
Revenue, net	$ 1,991	$ 1,568
Allowance for doubtful accounts	$ 0		$ 0
Net revenue | Customer Concentration Risk | Customer A
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)	35.00%
Net revenue | Customer Concentration Risk | Customer B
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)		19.00%
Net revenue | Customer Concentration Risk | Customer C
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)	15.00%
Net revenue | Customer Concentration Risk | Customer D
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)		17.00%
Net revenue | Customer Concentration Risk | Customer E
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)	11.00%
Net revenue | Geographic Concentration Risk
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Revenue, net	$ 1,991	$ 1,568
Net revenue | Geographic Concentration Risk | United states
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Revenue, net	1,001	270
Net revenue | Geographic Concentration Risk | Asia and Middle East
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Revenue, net	811	1,112
Net revenue | Geographic Concentration Risk | Europe and other
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Revenue, net	$ 179	$ 186
Accounts receivable | Credit Concentration Risk
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Number of customers | customer	1		3
Accounts receivable | Credit Concentration Risk | Customer One
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)	55.00%		39.00%
Accounts receivable | Credit Concentration Risk | Customer Two
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)			18.00%
Accounts receivable | Credit Concentration Risk | Customer Three
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Concentration risk (as a percent)			12.00%
Assets | Geographic Concentration Risk
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Total long-lived assets	$ 575		$ 712
Assets | Geographic Concentration Risk | United states
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Total long-lived assets	461		536
Assets | Geographic Concentration Risk | Asia
SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION
Total long-lived assets	$ 114		$ 176

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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