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Revenue from contracts with customers (Tables)

3 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

The following table depicts the disaggregation of revenue by type of products or services and timing of transfer of products or services (in thousands):

			Three months ended March 31,
			2023						2022
Type of products or services
QCaaS			$	1,168					$	1,384
Professional services			406						309
Other revenue			9						20
Total revenue, net			$	1,583					$	1,713
Timing of revenue recognition
Revenue recognized over the time			$	1,542					$	1,662
Revenue recognized at a point in time			41						51
Total revenue, net			$	1,583					$	1,713

The following table presents a summary of revenue by geography for the three months ended March 31, 2023 and 2022 (in thousands):

			Three months ended March 31,
			2023						2022
United States			$	247					$	777
Japan			308						434
Germany			288						263
United Kingdom			231						—
Other			509						239
Total revenue			$	1,583					$	1,713

Significant customers

The tables below present the significant customers on a percentage of total revenue basis for the three months ended March 31, 2023 and 2022.

			Three months ended March 31,
			2023						2022
Customer A			15		%				14		%
Customer B			13		%				13		%

Accounts receivable, contract assets and liabilities, and changes in deferred revenue

The following table provides information about account receivable, contract assets and liabilities as of March 31, 2023 and December 31, 2022 (in thousands):

			March 31,						December 31,
			2023						2022
Contract assets:
Trade account receivable			$	542					$	757
Unbilled receivables, included in 'Prepaid expenses and other current assets'			59						58
Total contract assets			601						815
Contract liabilities:
Deferred revenue, current			1,827						1,781
Deferred revenue, noncurrent			9						9
Customer deposit, included in 'Accrued expenses and other current liabilities'			45						45
Total contract liabilities			$	1,881					$	1,835

Changes in deferred revenue from contracts with customers were as follows (in thousands):

			March 31,						December 31,
			2023						2022
Balance at beginning of period			$	1,790					$	2,719
Deferral of revenue			1,166						5,325
Recognition of deferred revenue			(1,120)						(6,254)
Balance at end of period			$	1,836					$	1,790

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- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

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Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

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Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

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