Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Trade receivables	$ 64,163	$ 72,238
Unbilled receivables	12,761	11,309
Other receivables	307	287
Allowances for credit losses	(678)	(1,250)	$ (262)
Accounts receivable, net	$ 76,553	$ 82,584

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount of allowance for credit loss on accounts receivable.

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Amount due from parties in nontrade transactions, classified as other.

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