Gold And Silver Bullion - Bullion Holdings (Details) |
Sep. 30, 2016
USD ($)
oz
$ / oz
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
oz
$ / oz
|
|---|---|---|---|
| Schedule of Investments [Line Items] | |||
| Total carrying value | $ 3,876,000 | $ 2,988,000 | |
| Gold | |||
| Schedule of Investments [Line Items] | |||
| Ounces | oz | 1,597 | 1,623 | |
| Carrying value per ounce | $ / oz | 1,323 | 1,062 | |
| Total carrying value | $ 2,112 | $ 1,723 | |
| Silver | |||
| Schedule of Investments [Line Items] | |||
| Ounces | oz | 91,164 | 91,522 | |
| Carrying value per ounce | $ / oz | 19.35 | 13.82 | |
| Total carrying value | $ 1,764 | $ 1,265 |