Condensed Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024		Dec. 31, 2023		Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 418,538		$ 131,732
Accounts receivable, net of allowance of $4,593 and $3,564 as of September 30, 2024 and December 31, 2023, respectively	203,711		170,131
Prepaid expenses	9,699		6,269
Other current assets	1,697		1,622
Total current assets	633,645		309,754
Non-current assets:
Property and equipment, net	7,383		7,452
Website and software development costs, net	29,377		32,124
Right-to-use assets - operating leases, net	7,985		6,603
Intangible assets, net	43,032		48,781
Goodwill	140,919		140,905
Deferred tax assets, net	842		728
Other non-current assets	5,898		4,367
Total non-current assets	235,436		240,960
Total assets	869,081		550,714
Current liabilities:
Accounts payable	58,486		63,572
Accrued expenses	107,658		85,455
Acquisition-related liabilities	12,983		17,234
Deferred revenue	3,586		3,301
Other current liabilities	8,202		6,823
Total current liabilities	190,915		176,385
Non-current liabilities:
Long term borrowings	196,089		184,147
Acquisition-related liabilities			3,060
Other non-current liabilities	7,210		6,602
Total non-current liabilities	203,299		193,809
Total liabilities	394,214		370,194
Commitments and contingencies (Note 8)
Stockholders' equity:
Additional paid-in capital	1,520,044		1,140,849
Accumulated deficit	(1,043,544)		(958,537)
Accumulated other comprehensive loss	(1,863)		(2,010)
Total stockholders' equity	474,867	[1]	180,520	[2]	$ 128,030	[3]
Total liabilities and stockholders' equity	869,081		550,714
Common Class A [Member]
Stockholders' equity:
Common stock value	205		189
Common Class B [Member]
Stockholders' equity:
Common stock value	$ 25		$ 29

[1] Includes 181,588,344 outstanding Class A common stock, 17,497,975 outstanding Class B common stock, 24,048,565 unvested Class A restricted stock and 7,391,948 unvested Class B restricted stock.

[2] Includes 150,989,571 outstanding Class A common stock, 17,886,352 outstanding Class B common stock, 37,641,861 unvested Class A restricted stock and 11,169,137 unvested Class B restricted stock.

[3] Includes 132,909,894 outstanding Class A common stock, 15,512,217 outstanding Class B common stock, 42,357,023 unvested Class A restricted stock and 16,587,085 unvested Class B restricted stock.