OTHER SUPPLEMENTAL INFORMATION - Other current assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Security deposits - real estate	$ 1,978	$ 1,978
Prepaid expenses	1,826	1,136
Unamortized commercial insurance premiums	1,266	2,389
Other current assets	525	680
Total	10,812	11,049
Canada
Sales tax receivable	$ 5,217	$ 4,866