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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 17 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Cash flows from operating activities              
Net (loss)/income $ (382) $ (1,140) $ (9,554) $ (570) $ (1,522) $ (10,124)  
Adjustments to reconcile net loss to net cash used in operating activities              
Depreciation and amortization         52 427  
Amortization of operating lease right-of-use assets         87  
Share-based compensation expenses         203 151  
Provision for allowances for doubtful accounts         460 794  
Impairment on intangible assets   1,878   1,878  
Impairment on goodwill   5,412   5,412  
Impairment on long-term investments     471  
Deferred taxes         6 689  
Change in fair value of warrant liabilities (821)   526   (471) (948)  
Changes in operating assets and liabilities              
Accounts receivable         (866) (257)  
Prepayment and deposit to suppliers         (76) 1,504  
Due from related parties         227 23  
Other current assets         11 (16)  
Accounts payable         (2,153) (1,402)  
Accrued payroll and other accruals         232 154  
Lease payment liability related to a short-term lease         120  
Other current liabilities         (39) (495)  
Taxes payable         91 (77)  
Prepaid lease payment         (10)  
Net cash used in operating activities         (2,325) (4,321)  
Cash flows from investing activities              
Payment for purchase of office equipment         (6)  
Investment to an investee         (36)  
Short-term loan to an unrelated party         (2,111)  
Collection of short-term loan from an unrelated party         4,668  
Payment for acquisition of noncontrolling interest         (1,177)  
Payment for blockchain application platform development costs         (3,752) $ (3,720)
Purchase of software technology         (447)  
Net cash used in investing activities         (36) (2,825)  
Cash flows from financing activities              
Proceeds from issuance of common stock and warrant (net of cash offering cost of US$809)         10,263  
Repayment to investors related to terminated security purchase agreements         (957)  
Proceeds from short-term bank loan         442  
Repayment of short-term bank loan         (442)  
Net cash provided by financing activities         9,306  
Effect of exchange rate fluctuation on cash and cash equivalents         23 (26)  
Net (decrease)/increase in cash, cash equivalents, and restricted cash         (2,338) 2,134  
Cash, cash equivalents, and restricted cash at beginning of the period   $ 3,742   $ 2,952 3,742 2,952  
Cash, cash equivalents, and restricted cash at end of the period $ 1,404   $ 5,086   1,404 5,086 $ 1,404
Supplemental disclosure of cash flow information              
Income taxes paid          
Interest expense paid         25 130  
Unrelated Parties [Member]              
Changes in operating assets and liabilities              
Advance from customers         1,733 (2,197)  
Related Parties [Member]              
Changes in operating assets and liabilities              
Advance from customers         $ 54