Shareholders' Equity (Stock Option Transactions) (Details) - USD ($)
|
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Shareholders' Equity [Abstract] |
|
|
| Number of options, Outstanding, Beginning Balance |
165,800
|
|
| Weighted Average Exercise Price, Outstanding |
$ 5.58
|
|
| Weighted average remaining contractual term (in years), Outstanding |
6 years 9 months 18 days
|
6 years 1 month 2 days
|
| Aggregate Intrinsic Value, Outstanding |
$ 305,124
|
|
| Number of options, Granted in period |
62,500
|
7,500
|
| Weighted Average Exercise Price, Granted in period |
$ 6.36
|
|
| Number of options, Exercised in period |
(23,300)
|
|
| Weighted Average Exercise Price, Exercised in period |
$ 3.44
|
|
| Number of options, Forfeited in period |
(19,500)
|
|
| Weighed Average Exercise Price, Forfeited in period |
$ 4.74
|
|
| Number of options, Expired in period |
(1,000)
|
|
| Weighted Average Exercise Price, Expired in period |
$ 3.67
|
|
| Number of options, Outstanding, Ending Balance |
184,500
|
165,800
|
| Weighted Average Exercise Price, Outstanding |
$ 6.21
|
$ 5.58
|
| Aggregate Intrinsic Value, Outstanding |
$ 235,293
|
$ 305,124
|
| Number of options, Exercisable |
83,500
|
74,400
|
| Weighted Average Exercise Price, Exercisable |
$ 6.60
|
$ 6.07
|
| Weighted average remaining contractual term (in years), Exercisable |
4 years 8 months 23 days
|
4 years 9 months
|
| Aggregate Intrinsic Value, Exercisable |
$ 106,565
|
$ 119,342
|