Stockholders' Equity (Details 1) (USD $)	12 Months Ended
	Sep. 30, 2012
Summary of stock Options outstanding and exercisable
Options Outstanding Shares	245,956
Weighted Average Remaining Contractual Term option outstanding	6 years 3 months 18 days
Options Outstanding Weighted Average Exercise Price	$ 13.90
Options Outstanding Intrinsic Value	$ 11,634,229
Options Exercisable Shares	111,956
Weighted Average Remaining Contractual Term Option Exercisable	5 years 7 months 6 days
Options Exercisable Weighted Average Exercise Price	$ 10.88
Options Exercisable Intrinsic Value	5,633,679
Range One [Member]
Summary of stock Options outstanding and exercisable
Range of Exercise Prices Minimum	$ 0.00
Range of Exercise Prices Maximum	$ 6.75
Options Outstanding Shares	17,200
Weighted Average Remaining Contractual Term option outstanding	5 months 19 days
Options Outstanding Weighted Average Exercise Price	$ 4.30
Options Outstanding Intrinsic Value	978,841
Options Exercisable Shares	17,200
Weighted Average Remaining Contractual Term Option Exercisable	5 months 19 days
Options Exercisable Weighted Average Exercise Price	$ 4.30
Options Exercisable Intrinsic Value	978,841
Range Two [Member]
Summary of stock Options outstanding and exercisable
Range of Exercise Prices Minimum	$ 6.76
Range of Exercise Prices Maximum	$ 9.99
Options Outstanding Shares	144,756
Weighted Average Remaining Contractual Term option outstanding	6 years 2 months 12 days
Options Outstanding Weighted Average Exercise Price	$ 8.78
Options Outstanding Intrinsic Value	7,588,833
Options Exercisable Shares	73,756
Weighted Average Remaining Contractual Term Option Exercisable	6 years 2 months 12 days
Options Exercisable Weighted Average Exercise Price	$ 8.78
Options Exercisable Intrinsic Value	3,866,658
Range Three [Member]
Summary of stock Options outstanding and exercisable
Range of Exercise Prices Minimum	$ 10.00
Range of Exercise Prices Maximum	$ 26.98
Options Outstanding Shares	84,000
Weighted Average Remaining Contractual Term option outstanding	7 years 8 months 12 days
Options Outstanding Weighted Average Exercise Price	$ 24.70
Options Outstanding Intrinsic Value	3,066,555
Options Exercisable Shares	21,000
Weighted Average Remaining Contractual Term Option Exercisable	7 years 8 months 12 days
Options Exercisable Weighted Average Exercise Price	$ 23.67
Options Exercisable Intrinsic Value	$ 788,180