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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ (1,659) $ (3,193) $ 1,086
Adjustments to reconcile net income (loss) to net cash used in operating activities:      
Depreciation 61 100 43
Amortization 47 36 12
Stock-based compensation 1 3 (7)
Impairment loss on property, plant and equipment 109    
Impairment loss on intangible assets 15    
Impairment losses on prepaid licensing and royalty fees 85 244  
Bad debt expense 24 23 127
Gains on disposals of property, plant and equipment - net     (1)
Gains on disposal of marketable securities     (2)
Net loss on equity investments     24
Impairment losses on marketable securities and investments     52
Deferred income tax benefits     (1,672)
Loss of lawsuit contingent liabilities 96    
Net changes in:      
Accounts receivable 130 205 14
Prepaid expenses 10 267 137
Other current assets (15) 35 (6)
Prepaid licensing and royalty fees 306 (220) 561
Prepaid pension assets (29) 14 (9)
Accounts payable (40) (210) 48
Accrued expenses (153) (1,273) (1,331)
Other liabilities (555) 55 (186)
Net cash used in operating activities (1,567) (3,914) (1,110)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Proceeds from disposals of marketable securities     2
Purchases of property, plant and equipment (48) (66) (192)
Proceeds from disposals of property, plant and equipment     1
Proceeds from disposals of subsidiary and equity investments     1,058
Increase in intangible assets (14) (61) (11)
Decrease (increase) in refundable deposits (2) 11 37
Other (9) 26 40
Net cash provided by (used in) investing activities (73) (90) 935
CASH FLOWS FROM FINANCING ACTIVITIES:      
Proceeds from short-term borrowings     986
Repayments of short-term borrowings     (3,617)
Net cash used in financing activities     (2,631)
Net foreign currency exchange differences on cash, restricted cash and cash equivalents 88 (347) 772
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH (1,552) (4,351) (2,034)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF YEAR 59,826 64,177 66,211
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF YEAR 58,274 $ 59,826 64,177
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:      
Interest paid during the year     35
Income tax paid (refund) during the year $ (6)   $ 1