SIGNIFICANT ACCOUNTING POLICIES - Capital Advance receivable, net - current and overdue amounts (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total	$ 42,475	$ 56,101	$ 54,998	$ 67,682
Current
Financing Receivable, Past Due [Line Items]
Total	39,158	53,150
1-30 days overdue
Financing Receivable, Past Due [Line Items]
Total	1,065	964
30-60 overdue
Financing Receivable, Past Due [Line Items]
Total	721	704
60-90 overdue
Financing Receivable, Past Due [Line Items]
Total	236	163
Above 90 overdue
Financing Receivable, Past Due [Line Items]
Total	$ 1,295	$ 1,120