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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:      
NET LOSS $ (1,293) $ (1,659) $ (3,193)
Adjustments to reconcile net income (loss) to net cash used in operating activities:      
Depreciation 3 61 100
Amortization 5 47 36
Stock-based compensation 1 1 3
Impairment loss on property, plant and equipment   109  
Impairment loss on intangible assets   15  
Impairment losses on prepaid licensing and royalty fees 0 85 244
Bad debt expense 5 24 23
Loss of lawsuit contingent liabilities   96  
Net changes in:      
Accounts receivable 89 130 205
Prepaid expenses 25 10 267
Prepaid licensing and royalty fees (87) 306 (220)
Prepaid pension assets 19 (29) 14
Other assets (90) (15) 35
Accounts payable 5 (40) (210)
Accrued expenses 236 (153) (1,273)
Other liabilities (993) (555) 55
Net cash used in operating activities (2,075) (1,567) (3,914)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchase of marketable securities (10,000)    
Purchases of property, plant and equipment (24) (48) (66)
Increase in intangible assets (8) (14) (61)
Decrease (increase) in refundable deposits (9) (2) 11
Other   (9) 26
Net cash provided used in investing activities (10,041) (73) (90)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Net foreign currency exchange differences on cash, cash equivalents and restricted cash (156) 88 (347)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH (12,272) (1,552) (4,351)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF YEAR 58,274 59,826 64,177
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF YEAR $ 46,002 58,274 $ 59,826
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:      
Income tax refund during the year   $ (6)