Shareholders' Equity (Details 3) - Stock Options [Member] - USD ($)
|
6 Months Ended |
12 Months Ended |
Jun. 30, 2017 |
Dec. 31, 2016 |
| Class of Stock [Line Items] |
|
|
|
| Number of Shares Underlying Options, Outstanding, Beginning |
|
12,250
|
12,250
|
| Number of Shares Underlying Options, Granted |
|
|
|
| Number of Shares Underlying Options, Exercised |
|
|
|
| Number of Shares Underlying Options, Expired |
|
|
|
| Number of Shares Underlying Options, Outstanding, Ending |
|
12,250
|
12,250
|
| Number of Shares Underlying Options, Outstanding and Exercisable |
|
2,722
|
|
| Weighted Average Exercise Price Outstanding, Beginning balance |
|
$ 19.35
|
|
| Weighted Average Exercise Price, Granted |
|
|
|
| Weighted Average Exercise Price, Exercised |
|
|
|
| Weighted Average Exercise Price, Expired |
|
|
|
| Weighted Average Exercise Price Outstanding, Ending balance |
|
19.35
|
$ 19.35
|
| Weighted Average Exercise Price, Outstanding and Exercisable |
|
19.35
|
|
| Weighted Average Grant Date Fair Value Outstanding, Beginning balance |
|
4.78
|
|
| Weighted Average Grant Date Fair Value, Granted |
|
|
|
| Weighted Average Grant Date Fair Value, Exercised |
|
|
|
| Weighted Average Grant Date Fair Value, Expired |
|
|
|
| Weighted Average Grant Date Fair Value Outstanding, Ending balance |
|
4.78
|
$ 4.78
|
| Weighted Average Grant Date Fair Value, Outstanding and Exercisable |
|
$ 4.78
|
|
| Weighted Average Remaining Contractual Life, Outstanding |
|
4 years 4 months 6 days
|
4 years 10 months 3 days
|
| Weighted Average Remaining Contractual Life, Outstanding and Exercisable |
|
4 years 4 months 6 days
|
|
| Aggregate Intrinsic Value, Outstanding |
[1] |
|
|
| Aggregate Intrinsic Value, Outstanding and Exercisable |
[1] |
|
|
|
|