Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ (92)	$ 3,273
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	6,404	5,291
Loss from sale of property and equipment	610	209
Loss on deconsolidation of a subsidiary		1,085
Provision of bad debt allowance	1,429	1,117
Provision for obsolete inventories	6,735	6,753
Changes in fair value of trading securities	(150)	(131)
Changes in fair value of investment	(1,641)	(819)
Deferred income tax	24	154
Stock-based compensation	10	10
Changes in operating assets and liabilities
Accounts receivable	(16,737)	27,173
Inventories	(15,483)	10,161
Value added tax receivable	(416)	1,336
Other receivables and prepaid expenses	(710)	(135)
Advances on inventory purchases	2,418	(28)
Amounts due from related parties	3,563	(480)
Accounts payable	(2,238)	(9,316)
Accounts payable and other payables- related parties	(3,142)	1,145
Other payables and accrued liabilities	3,083	(3,098)
Value added and other taxes payable	71	(806)
Income tax payable	(747)	(148)
Net cash (used in) provided by operating activities	(17,009)	40,456
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(10,123)	(6,354)
Net purchase of trading securities	(1,309)	(1,665)
Investment payment	(775)	(2,936)
Net cash used in investing activities	(12,207)	(10,955)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from bank loans	73,340	90,729
Repayment of bank loans	(71,790)	(58,658)
Repurchase of common stock	363
Net collection of amounts due from related party (equity)	863	1,848
Net cash provided by financing activities	2,776	33,919
EFFECT OF EXCHANGE RATE CHANGES ON CASH	2,058	7,548
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(24,382)	70,968
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD	121,723	50,755
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	97,341	121,723
Reconciliation of cash, cash equivalents and restricted cash reported within their consolidated balance sheets:
Cash and Cash Equivalents	56,573	81,865
Restricted cash	40,768	39,858
Total	97,341	121,723
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Net asset (liabilities) derecognized due to deconsolidation of a subsidiary		1,164
Cash paid during the period for:
Interest	2,391	2,345
Income taxes	$ 2,945	$ 2,469