Shareholders' Equity (Details 4) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Options Outstanding (in shares)	366,346
Weighted Average Remaining Contractual Life (in years)	4 years 4 months 20 days
Outstanding Weighted Average Exercise Price Per Share (in dollars per share)	$ 2.41
Options Exercisable (in shares)	366,346	381,836
Exercisable Weighted Average Exercise Price Per Share (in dollars per share)	$ 2.41
Exercise Price Range One [Member]
Ranges of Exercise Prices Lower (in dollars per share)	1.18
Ranges of Exercise Prices Upper (in dollars per share)	$ 2.04
Options Outstanding (in shares)	94,485
Weighted Average Remaining Contractual Life (in years)	4 years 6 months 25 days
Outstanding Weighted Average Exercise Price Per Share (in dollars per share)	$ 1.35
Options Exercisable (in shares)	94,485
Exercisable Weighted Average Exercise Price Per Share (in dollars per share)	$ 1.35
Exercise Price Range Two [Member]
Ranges of Exercise Prices Lower (in dollars per share)	2.05
Ranges of Exercise Prices Upper (in dollars per share)	$ 3.09
Options Outstanding (in shares)	215,848
Weighted Average Remaining Contractual Life (in years)	4 years 9 months 29 days
Outstanding Weighted Average Exercise Price Per Share (in dollars per share)	$ 2.46
Options Exercisable (in shares)	215,848
Exercisable Weighted Average Exercise Price Per Share (in dollars per share)	$ 2.46
Exercise Price Range Three [Member]
Exercise Price (in dollars per share)	$ 4.02
Options Outstanding (in shares)	56,013
Weighted Average Remaining Contractual Life (in years)	2 years 4 months 24 days
Outstanding Weighted Average Exercise Price Per Share (in dollars per share)	$ 4.02
Options Exercisable (in shares)	56,016
Exercisable Weighted Average Exercise Price Per Share (in dollars per share)	$ 4.02