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REVENUE FROM CONTRACTS WITH CUSTOMERS
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
REVENUE FROM CONTRACTS WITH CUSTOMERS
3. REVENUE FROM CONTRACTS WITH CUSTOMERS
Disaggregation of revenue
Nature of Products and Services
The following table depicts the disaggregation of revenue by type of products or services and timing of transfer of products or services (in thousands):
Year Ended December 31,
20242023
Type of products or services
QCaaS$6,745 $4,895 
Professional services1,938 3,816 
Other revenue*144 47 
Total revenue$8,827 $8,758 
Timing of revenue recognition
Revenue recognized over time$8,773 $8,569 
Revenue recognized at a point in time54 189 
Total revenue$8,827 $8,758 
*Other revenue includes support and maintenance and printed circuit board sales.
Geographic Information
The following table presents a summary of revenue by geography for the years ended December 31, 2024 and 2023, based on customer location (in thousands):
Year Ended December 31,
20242023
United States$2,151 $3,325 
Germany1,894 1,268 
Japan1,133 909 
Canada1,101 432 
Other2,548 2,824 
Total revenue$8,827 $8,758 
"Other" includes the rest of Europe, the Middle East, Asia and Australia where the revenue from a single country is not greater than 10% of total consolidated revenue. The Company has not had any sales in China, Russia or Ukraine.
Significant customers
A significant customer is defined as one that comprises up to ten percent or more of total revenues in a particular year or ten percent of outstanding accounts receivable balance as of the period end.
The tables below present the significant customers on a percentage of total revenue basis for the years ended December 31, 2024 and 2023.
Year Ended December 31,
20242023
Customer A17 %12 %
Customer B— %11 %
Customer C— %11 %
As of each of December 31, 2024 and 2023, there were three significant customers that comprised ten percent or more of outstanding accounts receivable balances.
Contract balances
The following table provides information about account receivable, contract assets and liabilities as of December 31, 2024 and December 31, 2023 (in thousands):
As of December 31,
20242023
Trade accounts receivable and contract assets, net:
Trade accounts receivable, net of allowance for doubtful accounts and excluding unbilled receivables$867 $644 
Contract asset for unbilled receivables553 1,008 
Contract acquisition costs174 — 
Total contract assets$1,594 $1,652 
Contract liabilities:
Deferred revenue, current$18,686 $2,669 
Deferred revenue, non-current670 79 
Customer deposit1
48 45 
Total contract liabilities$19,404 $2,793 
1Customer deposit is included in accrued expenses and other current liabilities on the consolidated balance sheets.

The balance of trade accounts receivable, net as of December 31, 2022 was $0.8 million.
The allowance for credit losses related to trade accounts receivable was $0.2 million and zero as of December 31, 2024 and December 31, 2023. During the years ended December 31, 2024 and 2023, the Company wrote off $0.1 million and zero, respectively, in accounts receivable deemed uncollectible.
The revenue recognized in the consolidated statements of operations and comprehensive loss that was included in the contract liability balance at the beginning of each period was $2.7 million and $1.8 million for the year ended December 31, 2024 and 2023, respectively.
Changes in deferred revenue from contracts with customers were as follows (in thousands):
Year Ended December 31,
20242023
Balance at beginning of period$2,748 $1,790 
Deferral of revenue25,435 7,089 
Recognition of deferred revenue(8,827)(6,131)
Balance at end of period$19,356 $2,748 
Remaining performance obligations
A significant number of the Company’s product and service sales are short-term in nature with a contract term of one year or less. For those contracts, the Company has utilized the practical expedient in ASC 606-10-50-14 exempting the Company from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less.
As of December 31, 2024, the aggregate amount of remaining performance obligations that were unsatisfied or partially unsatisfied related to customer contracts was $19.4 million, of which approximately 93% is expected to be recognized to revenue in the next 12 months, 97% is expected to be recognized to revenue in the next two years, 99% is expected to be recognized within three years. Revenues allocated to remaining performance obligations represents the transaction price of noncancellable orders for which service has not been performed, which include deferred revenue and the amounts that will be invoiced and recognized as revenues in future periods from open contracts and excludes unexercised renewals.