Subsequent events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Nov. 10, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Subsequent Event [Line Items]
Proceeds from Issuance of Common Stock				$ 1,149	$ 2,454
Common Stock [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues		313,000	565,000
Common Stock [Member] | Subsequent Event [Member] | Rubric Capital Management L P [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues	877,192
Shares Issued, Price Per Share	$ 2.28
Proceeds from Issuance of Common Stock	$ 2,000