Subsequent events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Oct. 28, 2022	Jul. 29, 2022	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Subsequent Event [Line Items]
Aggregate purchase price			$ 2,454	$ 31,819	$ 163	$ 150,899
Subscription Agreement [Member] | Private Placement Offering [Member] | Preferred Stock Investor [Member]
Subsequent Event [Line Items]
Number of shares for make-whole payment under financing agreement		263,666
Subscription Agreement [Member] | Private Placement Offering [Member] | Preferred Stock Investor [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Number of shares for make-whole payment under financing agreement	263,666
Subscription Agreement [Member] | Private Placement Offering [Member] | Preferred Stock Investor [Member] | Preferred Stock [Member]
Subsequent Event [Line Items]
Shares issued and sold		7,000
Aggregate purchase price		$ 7,000
Subscription Agreement [Member] | Private Placement Offering [Member] | Preferred Stock Investor [Member] | Preferred Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Shares issued and sold	7,000
Aggregate purchase price	$ 7,000
Aggregate gross proceeds	$ 7,000
Financing Agreement Amendment No 16 [Member]
Subsequent Event [Line Items]
Exercise price of common stock		$ 0.01	$ 0.01
Warrants issued to purchase of common stock		185,000	125,000
Financing Agreement Amendment No 16 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Exercise price of common stock	$ 0.01
Warrants issued to purchase of common stock	125,000