Business Combination - Schedule of business combination proceeds (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Reverse Recapitalization [Abstract]
Cash – INSU’s trust and cash (net of redemptions)	$ 229,925
Cash – PIPE	170,000
Less transaction costs and advisory fees paid	31,456
Less cash payments to Metromile Operating Company stockholders	32,000
Net Business Combination and PIPE financing	336,469
Less non-cash net liabilities assumed from INSU	45,516
Net contributions from Business Combination and PIPE Financing	$ 290,953