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)
3 Months Ended
Mar. 31, 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:

Three Months Ended March 31, 2024 Year Ended December 31, 2023
Balance, beginning of period $ 8,963  $ 7,254 
Deferral of revenue 11,807  42,846 
Recognition of unearned revenue (11,756) (41,137)
Balance, end of period $ 9,014  $ 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 March 31,
2024 2023
Customer A 29  % 18  %
Customer B 11  % 14  %
Customer C 10  % 13  %
Percent of Accounts Receivable
March 31, 2024 December 31, 2023
Customer A 32  % 35  %
Customer C 12  % 11  %
Customer D 10  % n/a
Customer E n/a 10  %