For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Revenue - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 6,180	$ 17,726
Reduction of revenue related to stock warrant granted to a customer	5,303	0
Contract liabilities	5,656		$ 6,348
Deferred revenue, long-term	11,755		12,740
Contract asset	13,012	13,691	16,275	$ 11,253
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue	4,758	16,670
Goods and services transferred over time
Disaggregation of Revenue [Line Items]
Revenue	$ 1,422	$ 1,056
Revenue \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	100.00%	100.00%
Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	100.00%	100.00%
Revenue \| Timing of Recognition Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	100.00%	100.00%
Revenue \| Timing of Recognition Concentration Risk \| Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Concentration percentage	77.00%	94.00%
Revenue \| Timing of Recognition Concentration Risk \| Goods and services transferred over time
Disaggregation of Revenue [Line Items]
Concentration percentage	23.00%	6.00%
Products
Disaggregation of Revenue [Line Items]
Revenue	$ 4,362	$ 10,593
Products \| Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	71.00%	60.00%
License and services
Disaggregation of Revenue [Line Items]
Revenue	$ 1,818	$ 7,133
License and services \| Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	29.00%	40.00%
License \| Customer in Asia Pacific in Patent Cross-License Agreement
Disaggregation of Revenue [Line Items]
Revenue	$ 900	$ 6,400
Contract liabilities	3,800		3,800
Deferred revenue, long-term	11,100		11,900
Contract asset	13,000		$ 16,300
North America
Disaggregation of Revenue [Line Items]
Revenue	$ (1,304)	$ 5,044
North America \| Revenue \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	(21.00%)	28.00%
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 4,906	$ 9,506
Asia Pacific \| Revenue \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	79.00%	54.00%
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Revenue	$ 2,578	$ 3,176
Europe, Middle East and Africa \| Revenue \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration percentage	42.00%	18.00%