Deposit On Land Use Right And Construction In Progress - Jewelry Park - Additional Information (Detail) ¥ in Millions	1 Months Ended		9 Months Ended
	Oct. 23, 2013 USD ($) a m² ft²	Oct. 23, 2013 CNY (¥) a m² ft²	Sep. 30, 2015 USD ($)	Sep. 30, 2015 CNY (¥)	Sep. 30, 2015 CNY (¥)	Dec. 31, 2014 USD ($)
Deposit On Land Use Right [Line Items]
Area of Land | a	16.5	16.5
Land use right | $			$ 467,012			$ 492,027
Deposit On Land Use Right | $			9,498,536			$ 9,819,687
Wuhan Kingold
Deposit On Land Use Right [Line Items]
Land use right			$ 9,500,000		¥ 60.4
Equity Method Investment, Ownership Percentage			100.00%		100.00%
Development and Construction
Deposit On Land Use Right [Line Items]
Area of Land | m²	192,149	192,149
Land use right			$ 7,270,000		¥ 46.2
Interest Costs Capitalized			2,250,000	¥ 14.3
Development and Construction | Wuhan Kingold
Deposit On Land Use Right [Line Items]
Land use right | $			81,700,000
Land Use Right
Deposit On Land Use Right [Line Items]
Area of Land | ft²	717,598	717,598
Long-term Purchase Commitment, Amount	$ 164,000,000	¥ 1,000.0
Land use right			79,000,000		480.0
Interest Costs Capitalized				60.5
Land Use Right | Wuhan Kingold
Deposit On Land Use Right [Line Items]
Area of Land | m²	66,667	66,667
Long-term Purchase Commitment, Amount				¥ 1,000.0
Land use right					460.0
Deposit On Land Use Right					60.4
Land Use Right | Development and Construction
Deposit On Land Use Right [Line Items]
Land use right			164,000,000		1,000.0
Jewelry Park Project [Member]
Deposit On Land Use Right [Line Items]
Land use right			$ 93,000,000		¥ 520.0