Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net loss	$ (14,127,000)	$ (10,011,000)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	541,000	1,422,000
Share-based compensation expenses	233,000	2,271,000
Provision of allowances for doubtful accounts	1,523,000	1,462,000
Impairment on intangible assets	3,330,000	2,552,000
Impairment on goodwill	5,211,000	0
Impairment on long-term investments	453,000	44,000
Change in fair value of warrant liabilities	(1,669,000)
Loss on disposal of fixed assets		2,000
Deferred taxes	764,000	251,000
Changes in operating assets and liabilities
Accounts receivable	(232,000)	(4,848,000)
Other receivables	25,000	78,000
Prepayment and deposit to suppliers	1,345,000	948,000
Due from related parties	(178,000)	(7,000)
Accounts payable	161,000	2,654,000
Advances from customers	(2,414,000)	1,985,000
Accrued payroll and other accruals	28,000	141,000
Other payables	(307,000)	(58,000)
Taxes payable	(20,000)	76,000
Net cash used in operating activities	(5,389,000)	(1,320,000)
Cash flows from investing activities
Payment for office equipment	(11,000)	(4,000)
Withdraw long-term investment in an ownership interest investee	453,000	444,000
Short-term loan to unrelated parties	(2,107,000)	(2,814,000)
Collection of short-term loan from unrelated parties	4,676,000	296,000
Payment for acquisition of noncontrolling interest	(1,889,000)
Payment for blockchain application platform development costs	(3,738,000)
Purchase of software technology	(431,000)
Net cash used in investing activities	(3,047,000)	(2,078,000)
Cash flows from financing activities
Proceeds from issuance of common stock and warrant (net of cash offering cost of US$809)	10,263,000
Repayment to investors related to terminated security purchase agreements	(922,000)	0
Proceeds from short-term bank loan	907,000	741,000
Repayment of short-term bank loan	(756,000)	(741,000)
Net cash provided by financing activities	9,492,000
Effect of exchange rate fluctuation on cash, cash equivalents, and restricted cash	(266,000)	259,000
Net increase/(decrease) in cash, cash equivalents and restricted cash	790,000	(3,139,000)
Cash, cash equivalents, and restricted cash at beginning of the year	2,952,000	6,091,000
Cash, cash equivalents, and restricted cash at end of the year	3,742,000	2,952,000
Supplemental disclosure of cash flow information
Income taxes paid
Interest expense paid	157,000	38,000
Non-cash transactions:
Payable for purchasing of software technologies		$ 436,000