Quarterly report pursuant to Section 13 or 15(d)

Revenue, Accounts Receivable and Significant Customers (Tables)

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Revenue, Accounts Receivable and Significant Customers (Tables)
 6 Months Ended
Jun. 30, 2024
Revenue From Contract With Customer, Accounts Receivable, And Concentration Risk [Abstract]  
Schedule of changes in contract liability
Changes in the contract liability, which solely includes deferred revenue, were as follows:

Six Months Ended June 30, 2024 Year Ended December 31, 2023
Balance, beginning of period $ 8,963  $ 7,254 
Deferral of revenue 23,687  42,846 
Recognition of unearned revenue (23,748) (41,137)
Balance, end of period $ 8,902  $ 8,963 
Schedule of concentration of risk
The Company’s accounts receivable are derived from contracts with customers located in the U.S. Significant customers generating more than 10% of the Company's revenue during the period indicated or for which accounts receivable balance was more than 10% of the total accounts receivable balance were as follows:
Percent of Revenue for Three Months Ended June 30, Percent of Revenue for Six Months Ended June 30,
2024 2023 2024 2023
Customer A 30  % 21  % 30  % 19  %
Customer B 11  % 14  % 11  % 14  %
Customer C 10  % 12  % 10  % 12  %
Percent of Accounts Receivable
June 30, 2024 December 31, 2023
Customer A 33  % 35  %
Customer C n/a n/a
Customer D n/a 10  %
Customer E n/a n/a