|
Common Shares and Preferred Shares Stock Subscription (Details) (USD $)
|
12 Months Ended |
|
Dec. 31, 2014
|
| Stock subscription offering [Abstract] |
|
| Stock subscription offering, subscription price |
$ 19.70 |
| Stock subscription offering, number of shares subscribed |
637,714 |
| stock subscription offering, value of shares subscribed |
$ 12,563,000 |
| Stock subscription offering, minimum financed amount |
5,000 |
| Stock subscription offering, down payment |
10.00% |
| Stock subscription offering, term |
7 years |
| Stock subscription offering interest rate |
2.00% |
| Stock subscription offering, minimum amount to receive right |
$ 5,000 |
| stock subscription offering, number of shares purchased to receive one right |
3 |
| Stock subscription offering, number of rights issued |
211,800 |
| Stock subscription offering, portion exercisable per year |
14.29% |
| Stock subscription offering, right expiration term |
P7Y |