Related parties - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Jun. 29, 2023	Dec. 30, 2022	Jun. 30, 2023	Sep. 30, 2022
Related Party Transaction [Line Items]
Gross proceeds from issuance of shares			$ 1,150	$ 2,454
Subscription Agreement [Member] | Rubric Capital LP [Member]
Related Party Transaction [Line Items]
Stock issued during period shares new shares issued	312,525
Sale of stock, price Per share	$ 3.6797
Gross proceeds from issuance of shares	$ 1,150
Subscription Agreement [Member] | Series A Preferred Stock [Member] | Rubric Capital Management LP [Member]
Related Party Transaction [Line Items]
Redeemed outstanding shares		29,000
Purchase price per share		$ 1,333
Redemption purchase price		$ 3,000