Intangible Assets and Goodwill - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, Net [Abstract]
Accumulated Amortization	$ (2,225)	$ (2,061)
Net Carrying Amount	7,425
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	11,290	5,046
Accumulated Amortization	(2,225)	(2,061)
Net Carrying Amount	9,065	2,985
Trade name and other indefinite-lived intangibles
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	713	425
In-process patents and trademarks
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	$ 927	$ 873
Acquired content and customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	5 years 3 months 18 days	3 years 8 months 12 days
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	$ 8,060	$ 2,268
Accumulated Amortization	(1,991)	(1,859)
Net Carrying Amount	6,069	409
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (1,991)	$ (1,859)
Domain names
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	1 year 2 months 12 days	1 year 3 months 18 days
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	$ 245	$ 245
Accumulated Amortization	(172)	(156)
Net Carrying Amount	73	89
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (172)	$ (156)
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	18 years 10 months 24 days	19 years 1 month 6 days
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	$ 1,345	$ 1,235
Accumulated Amortization	(62)	(46)
Net Carrying Amount	1,283	1,189
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (62)	$ (46)