Revenue from contracts with customers (Tables)

6 Months Ended

Jun. 30, 2022

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 June 30,
	2022		2021
Type of products or services
QCaaS	$	1,176	$	961
Professional services	156		158
Other revenue	39		18
Total revenue, net	$	1,371	$	1,137
Timing of revenue recognition
Revenue recognized over the time	$	1,296	$	1,099
Revenue recognized at a point in time	75		38
Total revenue, net	$	1,371	$	1,137

	Six months ended June 30,
	2022		2021
Type of products or services
QCaaS	$	2,560	$	2,083
Professional services	464		429
Other revenue	59		34
Total revenue, net	$	3,083	$	2,546
Timing of revenue recognition
Revenue recognized over the time	$	2,957	$	2,484
Revenue recognized at a point in time	126		62
Total revenue, net	$	3,083	$	2,546

The following table presents a summary of revenue by geography for the three and six month periods ended June 30, 2022 and 2021:

	Three months ended June 30,
	2022		2021
United States	$	655	$	622
Japan	282		354
Germany	257		65
Other	177		96
Total revenue	$	1,371	$	1,137

	Six months ended June 30,
	2022		2021
United States	$	1,439	$	1,325
Japan	709		921
Germany	520		127
Other	415		173
Total revenue	$	3,083	$	2,546

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 June 30, 2022 and December 31, 2021 (in thousands):

	June 30,		December 31,
	2022		2021
Contract assets:
Trade account receivable	$	918	$	421
Unbilled receivables, which are included in 'Prepaid expenses and other current assets'	41		17
Total contract assets	959		438
Contract liabilities:
Deferred revenue, current	2,595		2,665
Deferred revenue, noncurrent	20		54
Customer deposit, which are included in 'Accrued expenses and other current liabilities'	21		21
Total contract liabilities	$	2,636	$	2,740

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

	June 30,		December 31,
	2022		2021
Balance at beginning of period	$	2,719	$	4,713
Deferral of revenue	2,906		4,092
Recognition of deferred revenue	(3,010)		(6,086)
Balance at end of period	$	2,615	$	2,719