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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)
 9 Months Ended
Sep. 30, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of 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 September 30,Nine Months Ended September 30,
2024202320242023
Type of products or services
QCaaS$1,599 $1,132 $5,071 $3,333 
Professional services271 1,338 1,305 2,234 
Other revenue*— 92 142 285 
Total revenue$1,870 $2,562 $6,518 $5,852 
Timing of revenue recognition
Revenue recognized over time$1,856 $2,506 $6,480 $5,713 
Revenue recognized at a point in time14 56 38 139 
Total revenue$1,870 $2,562 $6,518 $5,852 
*Other revenue includes support, maintenance and printed circuit board sales. For the three and nine months ended September 30, 2023, maintenance revenues have been reclassified from professional services to other revenue.
The following table presents a summary of revenue by geography for the three and nine months ended September 30, 2024 and 2023, based on customer location (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
United States$484 $1,083 $1,845 $1,814 
Germany483 287 1,488 865 
Canada230 — 775 — 
Japan175 299 610 920 
Switzerland197 311 501 686 
Other301 582 1,299 1,567 
Total revenue$1,870 $2,562 $6,518 $5,852 
Schedule of Significant Customers
The tables below present the significant customers on a percentage of total revenue basis for the three and nine months ended September 30, 2024 and 2023.
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Customer A— %13 %— %14 %
Customer B19 %— %18 %11 %
Customer C— %— %— %10 %
Customer D— %12 %— %12 %
Customer E11 %12 %— %12 %
Schedule of Contract Balances and Revenue Recognized
The following table provides information about account receivable, contract assets and liabilities as of September 30, 2024 and December 31, 2023 (in thousands):
As of September 30, 2024As of December 31, 2023
Trade accounts receivable and contract assets, net:
Trade account receivable, excluding unbilled receivables$867 $644 
Contract asset for unbilled receivables589 1,008 
Contract acquisition costs200 — 
Total contract assets$1,656 $1,652 
Contract liabilities:
Deferred revenue, current$2,910 $2,669 
Deferred revenue, non-current57 79 
Customer deposit1
45 45 
Total contract liabilities$3,012 $2,793 
1Customer deposit is included in accrued expenses and other current liabilities on the condensed consolidated balance sheets.
Changes in deferred revenue from contracts with customers were as follows (in thousands):
Nine Months Ended September 30,
20242023
Balance at beginning of period$2,748 $1,790 
Deferral of revenue6,768 4,353 
Recognition of deferred revenue(6,549)(3,874)
Balance at end of period$2,967 $2,269