v3.23.1
FINANCIAL INFORMATION OF PARENT COMPANY - Statements of Cash Flows (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ (12,311) $ (17,787) $ 6,448
Share-based compensation 60 186 186
Bad debt provisions 100 258 412
CHANGES IN WORKING CAPITAL ACCOUNTS      
Other current assets 614 547 (606)
Accrued expenses and other current liabilities (331) 620 141
Amount due from subsidiaries 0 27 1
Net cash used in operating activities 614 (4,975) (5,555)
CASH FLOWS FROM FINANCING ACTIVITIES      
Net cash provided by financing activities 1,212 (9,433) 19,164
Net decrease in cash, cash equivalents and restricted cash 1,131 (14,041) 14,651
Cash, cash equivalents and restricted cash, at beginning of year 1,569 15,610 959
Cash, cash equivalents and restricted cash, at end of year 2,700 1,569 15,610
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES:      
Share issuance for purchase of property and equipment 34,179 8,950 2,531
Parent Company | Reportable Legal Entities      
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) (13,335) (17,335) 7,527
Investment income (loss) in subsidiaries 12,145 16,758 (7,809)
Share-based compensation 60 186 186
CHANGES IN WORKING CAPITAL ACCOUNTS      
Accrued expenses and other current liabilities 1,130 391 96
CASH FLOWS FROM FINANCING ACTIVITIES      
Cash, cash equivalents and restricted cash, at beginning of year 2 2 2
Cash, cash equivalents and restricted cash, at end of year 2 2 2
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES:      
Share issuance for purchase of property and equipment $ 34,179 $ 8,950 $ 2,531