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10. Interests in affiliates (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Balance Sheet: |  |  |
Total assets | $ 24,947 | $ 23,864 |
Total liabilities | 7,191 | 5,955 |
Operating results: |  |  |
Operating profits | (59) | (1,674) | (1,378)
Tianlan |  |  |
Balance Sheet: |  |  |
Current assets | 57,431 | 49,064 |
Non-current assets | 9,605 | 10,322 |
Total assets | 67,036 | 59,386 |
Total liabilities | (42,889) | (35,154) |
Total shareholders’ equity | 24,147 | 24,232 |
Operating results: |  |  |
Net sales | 44,543 | 45,966 |
Operating profits | 616 | 6,899 |
Net (loss)/profits | (196) | 6,407 |
Jia Huan |  |  |
Balance Sheet: |  |  |
Current assets | 17,371 | 16,645 |
Non-current assets | 5,650 | 5,402 |
Total assets | 23,021 | 22,047 |
Total liabilities | (9,893) | (9,295) |
Total shareholders’ equity | 13,128 | 12,752 |
Operating results: |  |  |
Net sales | 12,631 | 8,151 |
Operating profits | 74 | (903) |
Net (loss)/profits | $ 243 | $ (749) |

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