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GOLD AND SILVER BULLION (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
GOLD AND SILVER BULLION        
Total cost $ 12,963,000 $ 12,963,000   $ 22,810,000
Changes in the Company's holdings of gold and silver        
Opening Balance   22,810,000 4,569,000 4,569,000
Purchases     31,299,000 31,299,000
Proceeds from sale   (11,330,000) (2,173,000) (11,739,000)
Gain on sale 434,000 1,842,000 524,000 2,075,000
Unrealized loss on silver bullion (359,000) (359,000)   (3,394,000)
Ending Balance 12,963,000 12,963,000   22,810,000
Gold
        
GOLD AND SILVER BULLION        
# of ounces 3,223 3,223   5,656
Average cost per ounce (in dollars per ounce) 1,278.63 1,278.63   1,278.63
Total cost 4,121,000 4,121,000   7,232,000
Fair value per ounce (in dollars per ounce) 1,598.50 1,598.50   1,574.50
Total fair value 5,152,000 5,152,000   8,905,000
Quantity sold (in ounces)   2,433    
Cost of investments sold   3,100,000    
Changes in the Company's holdings of gold and silver        
Opening Balance   7,232,000 4,569,000 4,569,000
Purchases       7,387,000
Proceeds from sale   (4,026,000)   (6,218,000)
Gain on sale   915,000   1,494,000
Ending Balance 4,121,000 4,121,000   7,232,000
Silver
        
GOLD AND SILVER BULLION        
# of ounces 326,512 326,512   552,812
Average cost per ounce (in dollars per ounce) 27.08 27.08   28.18
Total cost 8,842,000 8,842,000   15,578,000
Fair value per ounce (in dollars per ounce) 27.08 27.08   28.18
Total fair value 8,842,000 8,842,000   15,578,000
Quantity sold (in ounces)   226,299    
Cost of investments sold   6,400,000    
Changes in the Company's holdings of gold and silver        
Opening Balance   15,578,000    
Purchases       23,912,000
Proceeds from sale   (7,304,000)   (5,521,000)
Gain on sale   927,000   581,000
Unrealized loss on silver bullion   (359,000)   (3,394,000)
Ending Balance $ 8,842,000 $ 8,842,000   $ 15,578,000