Condensed Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 116,180	$ 50,725
Accounts receivable, net of allowance of $2,046 and $2,207 as of September 30, 2021 and December 31, 2020, respectively	72,785	79,366
Prepaid expenses	5,820	3,903
Other current assets	3,058	7,374
Total current assets	197,843	141,368
Property and equipment, net	5,869	6,117
Website and software development costs, net	38,477	32,891
Intangible assets, net	28,932	28,591
Goodwill	81,917	76,432
Deferred tax assets,	195	366
Other non-current assets	1,063	521
Total non-current assets	156,453	144,918
Total assets	354,296	286,286
Current liabilities:
Accounts payable	27,905	40,976
Accrued expenses	50,619	44,622
Acquisition related liabilities	16,155	6,018
Deferred revenue	2,739	4,053
Other current liabilities	5,044	8,310
Total current liabilities	102,462	103,979
Non-current liabilities:
Long term borrowings	183,528	189,693
Acquisition related liabilities	8,731	17,137
Warrants and derivative liabilities		58,100
Other non-current liabilities	3,790	2,387
Total non-current liabilities	196,049	267,317
Total liabilities	298,511	371,296
Commitments and contingencies (Note 8)
Mezzanine equity
Redeemable convertible preferred stock $0.001 per share par value, up to 60,137,979 shares authorized and 39,223,194 shares issued and outstanding as of December 31, 2020		154,210
Treasury common stock, 8,195,464 shares repurchased at a weighted average price of $2.86 per share	(23,469)	(23,469)
Additional paid-in capital	511,929	28,425
Accumulated deficit	(430,679)	(242,254)
Accumulated other comprehensive loss	(2,189)	(2,037)
Total stockholders' equity / (deficit)	55,785	(239,220)
Total liabilities and stockholders' equity / (deficit)	354,296	286,286
Common Class A [Member]
Mezzanine equity
Common stock value	155
Total stockholders' equity / (deficit)	155
Common Class B [Member]
Mezzanine equity
Common stock value	38
Total stockholders' equity / (deficit)	$ 38
Series A Common Stock [Member]
Mezzanine equity
Common stock value		112
Total stockholders' equity / (deficit)		112
Series B Common Stock [Member]
Mezzanine equity
Common stock value		3
Total stockholders' equity / (deficit)		$ 3