Proportion of Equity Interest After Restructuring (Detail)	Dec. 31, 2012
Magnify Wealth
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Magnify Wealth | Mr. Fo-Ho Chu (" Mr. Chu ")
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Ally Profit
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Ally Profit | Magnify Wealth
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Lihua Holdings
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Lihua Holdings | Ally Profit
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Lihua Electron
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Lihua Electron | Mr. Fo-Ho Chu (" Mr. Chu ")
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	45.46%
Equity Method Investment Ownership Percentage After Restructuring	0.00%
Lihua Electron | Lihua Holdings
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	0.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Lihua Electron | Danyang Special Electronics Co., Ltd.
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	52.27%	[1]
Equity Method Investment Ownership Percentage After Restructuring	0.00%
Lihua Electron | Imbis Europe B.V. h/o Asia Trading (EDC) (" Europe EDC ")
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	2.27%
Equity Method Investment Ownership Percentage After Restructuring	0.00%
Lihua Copper
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	100.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Lihua Copper | Lihua Holdings
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	0.00%
Equity Method Investment Ownership Percentage After Restructuring	100.00%
Lihua Copper | Danyang Special Electronics Co., Ltd.
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	25.00%	[1]
Equity Method Investment Ownership Percentage After Restructuring	0.00%
Lihua Copper | Invest Unicorn Holdings Limited
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage Before Restructuring	75.00%	[2]
Equity Method Investment Ownership Percentage After Restructuring	0.00%

[1] Equity interests in Danyang Special Electronics Co., Ltd., a PRC domestic company, are held as to 60% by Mr. Zhu and 40% by his wife. Mr. Zhu and his wife are acting in concert and considered parties to the same control group.

[2] Invest Unicorn Holdings Limited, incorporated in the British Virgin Islands, is 100% beneficially owned by Mr. Zhu.