Net loss per share (Details) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2021 USD ($)
Numerator:
Net loss | $	$ (18,280)	$ (16,356)	$ (17,968)	$ (20,040)	$ (17,153)	$ (17,238)	$ (52,604)	$ (54,430)	$ (75,700)
Denominator:
Weighted-average common shares outstanding, basic and diluted	54,733,709			29,896,426			49,403,999	29,837,389
Weighted-average Series A convertible preferred shares outstanding, basic and diluted, presented as if converted into common stock	1,697,000			2,978,000			1,697,000	2,978,000
Weighted-average Series A-1 convertible preferred shares outstanding, basic and diluted, presented as if converted into common stock	15,800,000						12,153,846
Total number of shares used to calculate net loss per share, basic	72,230,709			32,874,426			63,254,845	32,815,389
Total number of shares used to calculate net loss per share, diluted	72,230,709			32,874,426			63,254,845	32,815,389
Net loss per share - basic | $ / shares	$ (0.25)			$ (0.61)			$ (0.83)	$ (1.66)
Net loss per share - diluted | $ / shares	$ (0.25)			$ (0.61)			$ (0.83)	$ (1.66)
Number of common stock issued upon conversion of each share of Preferred Stock	1,000						1,000
Number of common stock issuable upon conversion of Series A-1 convertible preferred stock	15,800,000						15,800,000
Shares Conversion Ratio							1,697,000