Significant Accounting Policies (Stock Transactions - Stock Option Plans) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Significant Accounting Policies [Abstract]
Options Outstanding, beginning shares	475,396
Options granted, shares	89,000	40,000
Options Outstanding, ending shares	564,396		475,396
Shares Exercisable	410,234
Weighted average exercise price, Options Outstanding, beginning	$ 7.09
Weighted average exercise price, Options granted	11.06	$ 9.12
Weighted average exercise price, Options Outstanding, ending	7.72		$ 7.09
Weighted average exercise price, Options Exercisable	$ 6.76
Weighted average remaining contractual life (in years), Options Outstanding	5 years 7 months 6 days		5 years 1 month 6 days
Weighted average remaining contractual life (in years), Options Exercisable	4 years 2 months 12 days
Aggregate intrinsic value: Options Outstanding	$ 2,146,524		$ 2,562,175
Aggregate intrinsic value, Options Exercisable	$ 1,944,498