Stock Compensation (Details 1)	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Summary of option outstanding and exercisable
Options Outstanding	561,740
Options Exercisable	236,310
$ 4.00 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 4.00
Options Outstanding	300,000
Options Exercisable
Weighted Average Remaining Contractual Life	9 years 10 months 25 days
$ 8.60 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 8.60
Options Outstanding	16,000
Options Exercisable	16,000
Weighted Average Remaining Contractual Life	6 years 8 months 12 days
$ 10.00 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 10.00
Options Outstanding	40
Options Exercisable	40
Weighted Average Remaining Contractual Life	5 years 4 months 20 days
$ 12.10 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 12.10
Options Outstanding	30,000
Options Exercisable	30,000
Weighted Average Remaining Contractual Life	6 years 10 months 10 days
$ 12.50 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 12.50
Options Outstanding	81,700
Options Exercisable	60,221
Weighted Average Remaining Contractual Life	4 years 11 months 23 days
$ 13.45 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 13.45
Options Outstanding	2,000
Options Exercisable	1,000
Weighted Average Remaining Contractual Life	6 years 11 months 23 days
$ 13.50 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 13.50
Options Outstanding	12,000
Options Exercisable	9,049
Weighted Average Remaining Contractual Life	6 years 11 months 26 days
$ 17.50 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 17.50
Options Outstanding	100,000
Options Exercisable	100,000
Weighted Average Remaining Contractual Life	5 years 7 months 10 days
$ 32.00 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 32.00
Options Outstanding	15,000
Options Exercisable	15,000
Weighted Average Remaining Contractual Life	4 years 15 days
$ 34.50 [Member]
Summary of option outstanding and exercisable
Exercise Price | $ / shares	$ 34.50
Options Outstanding	5,000
Options Exercisable	5,000
Weighted Average Remaining Contractual Life	4 years 26 days