Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net revenue		$ 334,949	$ 391,148
Cost of revenue (exclusive of depreciation and amortization)		252,050	287,820
Gross profit (exclusive of depreciation and amortization)		82,899	103,328
Salaries and related costs		43,583	49,872
General and administrative expenses		46,578	41,878
Depreciation and amortization		19,460	28,242
Impairment of goodwill		49,390	0
Impairment of intangible assets		16,744	21,570
Acquisition costs		3,020	1,650
Change in fair value of contingent consideration liabilities		(1,833)	2,583
Loss from operations		(94,043)	(42,467)
Intercompany eliminations
Segment Reporting Information [Line Items]
Net revenue		(27,632)	(39,284)
Cost of revenue (exclusive of depreciation and amortization)		(27,632)	(39,284)
Brand Direct | Operating Segments
Segment Reporting Information [Line Items]
Net revenue		204,456	204,240
Cost of revenue (exclusive of depreciation and amortization)		164,577	161,445
Gross profit (exclusive of depreciation and amortization)		39,879	42,795
Impairment of goodwill		15,595
Impairment of intangible assets		1,500	900
Marketplace | Operating Segments
Segment Reporting Information [Line Items]
Net revenue		149,782	216,385
Cost of revenue (exclusive of depreciation and amortization)		113,240	164,226
Gross profit (exclusive of depreciation and amortization)		36,542	52,159
Impairment of goodwill	$ 33,800	33,795
Impairment of intangible assets		14,700	20,700
Technology Solutions | Operating Segments
Segment Reporting Information [Line Items]
Net revenue		8,343	9,807
Cost of revenue (exclusive of depreciation and amortization)		1,865	1,433
Gross profit (exclusive of depreciation and amortization)		6,478	$ 8,374
Impairment of goodwill		$ 0