Goodwill and Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Finite-lived intangible assets:
Gross Carrying Amount	$ 21,890	$ 21,890
Accumulated amortization	(8,197)	(7,266)
Total	13,693	14,624
Indefinite-lived intangible assets:
Trade name – website domain (forge.com)	2,202	2,202
Intangible Assets, Net (Including Goodwill) [Abstract]
Gross Carrying Amount	24,092	24,092
Accumulated amortization	(8,197)	(7,266)
Net Carrying Amount	15,895	16,826
Trade name
Indefinite-lived intangible assets:
Trade name – website domain (forge.com)	$ 2,202	$ 2,202
Developed technology
Finite-lived intangible assets:
Weight Average Remaining Amortization Period	2 years 8 months 12 days	3 years
Gross Carrying Amount	$ 13,200	$ 13,200
Accumulated amortization	(5,946)	(5,250)
Total	7,254	7,950
Intangible Assets, Net (Including Goodwill) [Abstract]
Accumulated amortization	$ (5,946)	$ (5,250)
Customer relationships
Finite-lived intangible assets:
Weight Average Remaining Amortization Period	6 years 9 months 18 days	7 years
Gross Carrying Amount	$ 7,410	$ 7,410
Accumulated amortization	(1,931)	(1,696)
Total	5,479	5,714
Intangible Assets, Net (Including Goodwill) [Abstract]
Accumulated amortization	$ (1,931)	$ (1,696)
Trade name
Finite-lived intangible assets:
Weight Average Remaining Amortization Period	0 years	0 years
Gross Carrying Amount	$ 320	$ 320
Accumulated amortization	(320)	(320)
Total	0	0
Intangible Assets, Net (Including Goodwill) [Abstract]
Accumulated amortization	$ (320)	$ (320)
Launched IPR&D assets
Finite-lived intangible assets:
Weight Average Remaining Amortization Period	4 years 6 months	5 years
Gross Carrying Amount	$ 960	$ 960
Accumulated amortization	0	0
Total	960	960
Intangible Assets, Net (Including Goodwill) [Abstract]
Accumulated amortization	$ 0	$ 0