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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:      
NET LOSS $ (3,425) $ (1,293) $ (1,659)
Adjustments to reconcile net income (loss) to net cash used in operating activities:      
Depreciation 11 3 61
Amortization 9 5 47
Stock-based compensation   1 1
Impairment loss on property, plant and equipment     109
Impairment loss on intangible assets     15
Impairment losses on prepaid licensing and royalty fees 0 0 85
Bad debt expense 7 5 24
Gain on disposal of marketable securities and investments (125)    
Loss of lawsuit contingent liabilities     96
Net changes in:      
Accounts receivable 3 89 130
Prepaid expenses (313) 25 10
Prepaid licensing and royalty fees 96 (87) 306
Prepaid pension assets (16) 19 (29)
Other assets (151) (90) (15)
Accounts payable 47 5 (40)
Accrued expenses (80) 236 (153)
Other liabilities (198) (993) (555)
Net cash used in operating activities (4,135) (2,075) (1,567)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchase of marketable securities   (10,000)  
Purchases of property, plant and equipment (76) (24) (48)
Increase in intangible assets (17) (8) (14)
Proceeds from disposal of marketable securities 80    
Decrease (increase) in refundable deposits (4) (9) (2)
Other     (9)
Net cash used in investing activities (17) (10,041) (73)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Net foreign currency exchange differences on cash, cash equivalents and restricted cash (89) (156) 88
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH (4,241) (12,272) (1,552)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF YEAR 46,002 58,274 59,826
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF YEAR 41,761 $ 46,002 58,274
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:      
Income tax refund during the year $ (2)   $ (6)