Indebtedness - Non-current asset on the balance sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Common and Preferred Stock
Current	$ 67	$ 57
Non current	153	221
NEBT Loan
Common and Preferred Stock
Current	8	13
Non current	24	31
RETOS 2015
Common and Preferred Stock
Current	59	44
Non current	$ 129	$ 190