Revenue from Contracts with Customers - Contract Balances (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) item	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) item
Revenue from Contracts with Customers
Signing bonuses received from vendors, in prior years | item			2		2
Contract liabilities	$ 2,400,000		$ 2,400,000		$ 1,900,000
Increase in recognized revenues and contract liabilities	300,000	$ 200,000	700,000	$ 600,000
Decrease in contract liabilities due to passage of time	(300,000)	(200,000)	(700,000)	(600,000)
Change in contract liabilities due to changes in transaction price estimates		$ 0		$ 0
Receivables from contracts with customers or contract assets	$ 0		$ 0		$ 0