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Discontinued operations - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Elimination of certain outstanding payables, earn-out liabilities and tax provisions | $ 41,600,000 |
Contingent Acquisition Payable | 99,000 | 16,820,000
Option to acquire Shares in Tiger Media | 387,188 |
Option to acquire Shares in Tiger Media, Exercise Shares | $ 5.47 |
Extinguished acquisition payable | 17,968,000 |
Zhejiang Continental [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Percentage of divested in equity shares | 100.00% |
Contingent Acquisition Payable | 8,250,000 | 8,205,000
Issuance of ordinary shares | 1,000,000 |
Extinguished acquisition payable | 6,550,000 |
Shenyang Jingli [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Percentage of divested in equity shares | 100.00% |
Contingent Acquisition Payable | 1,437,000 |
Extinguished acquisition payable | 1,437,000 |
Qingdao Kaixiang [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Percentage of divested in equity shares | 100.00% |
Contingent Acquisition Payable | 4,126,000 | 4,156,000
Extinguished acquisition payable | 4,126,000 |
Wuxi Ruizhong [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Percentage of divested in equity shares | 100.00% |
Contingent Acquisition Payable | 322,000 | 571,000
Extinguished acquisition payable | 1,039,000 |
Search Media International [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Option to acquire Shares in Tiger Media | 650,000 |
Option to acquire Shares in Tiger Media, Exercise Shares | $ 1.25 |
Description Regarding Arrangement For Collection Of Receivables | The independent third party will pursue the collection of all receivables and all claims for SearchMedia International, for the benefit of Tiger Media and share 50% of any receivables, net proceeds, awards or judgments from any claims or lawsuits brought about by SearchMedia International entities; provided, however, 100% of any sale proceeds from the sale or transfer of any of the SearchMedia International's subsidiaries |
Percentage of net proceeds from transfer of discontinued operations | 50.00% |
Percentage of net proceeds from transfer of subsidiaries | 100.00% |
Wanshuizhiyuan [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Extinguished acquisition payable | 1,206,000 |
Wenzhou Rigao [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Contingent Acquisition Payable |  | 2,116,000
Extinguished acquisition payable | $ 3,610,000 |

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