Shareholders' Equity (Details 4)	3 Months Ended
	Mar. 31, 2017 $ / shares shares
Summary of options outstanding by exercise price range
Options Outstanding, Number of Shares Underlying Options	12,250
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 7 months 2 days
Options Exercisable, Number Exercisable	1,701
Stock Options [Member] | Range one [Member]
Summary of options outstanding by exercise price range
Options Outstanding, Exercise Price | $ / shares	$ 12.00
Options Outstanding, Number of Shares Underlying Options	1,000
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 7 months 2 days
Options Exercisable, Number Exercisable	139
Options Exercisable, Exercise Price | $ / shares	$ 12.00
Stock Options [Member] | Range two [Member]
Summary of options outstanding by exercise price range
Options Outstanding, Exercise Price | $ / shares	$ 20.00
Options Outstanding, Number of Shares Underlying Options	11,250
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 7 months 2 days
Options Exercisable, Number Exercisable	1,562
Options Exercisable, Exercise Price | $ / shares	$ 20.00