Inventories (Details) - USD ($) |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Inventories [Abstract] | ||
| Raw materials | $ 775,427 | $ 873,306 |
| Work-in-process | 265,113 | 370,220 |
| Finished goods | 1,078,172 | 1,270,715 |
| Total | 2,118,712 | 2,514,241 |
| Silver inventory | $ 313,738 | $ 439,800 |