Schedule of Long-term restricted cash and bond reserves (Details)
|
12 Months Ended |
|
Dec. 31, 2015
USD ($)
|
|---|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 1 |
$ 1,468,898
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 2 |
1,468,898
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 3 |
0
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 4 |
1,594,605
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 5 |
708,300
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 6 |
604,529
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 7 |
314,590
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 8 |
212,298
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 9 |
270,000
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 10 |
270,000
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 11 |
2,542,058
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 12 |
2,582,606
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 13 |
4,507,110
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 14 |
4,505,150
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 15 |
4,966,543
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 16 |
4,761,927
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 17 |
2,718,290
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 18 |
2,690,083
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 19 |
17,495,789
|
| Restricted Cash And Bond Reserves Schedule Of Long-term Restricted Cash And Bond Reserves 20 |
$ 18,690,096
|