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Consolidated Statements of Cash Flow - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
cash flows from Operating activities:      
Net income (loss) $ 4,404 $ 1,470 $ (137)
Adjustments to reconcile net income to net cash used in operating activities:      
Depreciation of property, plant and equipment 2 2 1
Share-based compensation 506
Allowance for doubtful accounts - accounts receivables 1 5 1
Allowance for doubtful accounts - other receivables 158 146 81
Loss on acquisition 5,679
Income from disposal of discontinued operations (63)
Changes in operating assets and liabilities:      
Accounts receivable (2,065) (5,455) (713)
Other receivables (36,019) (1,498) (7,966)
Amount due from related parties (2,871) 3,278 (4,100)
Tax payables 292 364 4
Accounts payable (11,940) 3,851 6,995
Other payables 1,484 (217) (1,750)
Amount due to related parties (3,666) (1,934) 7,509
Contract liabilities 546 32 30
Net cash (used in) generated from operating activities (43,552) 44 (45)
cash flows from Investing activities:      
Purchases of property and equipment (501) 2
Proceed from disposals of discontinued operations 3,500
Net cash (used in) generated from investing activities 2,999 2
Cash flows from Financing activities:      
Proceed from share issuance, net of issuance costs 3,578
Proceeds from private equity placement, net of issuance costs 39,973
Net cash generated from (used in) financing activities 43,551
Effect of exchange rates on cash 683 (16) 2
Net changes in cash and cash equivalents 3,681 28 (41)
CASH AND CASH EQUIVALENTS, beginning of year 41 13 54
CASH AND CASH EQUIVALENTS, end of year $ 3,722 $ 41 $ 13