Fair Value Measurements - Change in Fair Value of Contingent Consideration Obligations (Detail) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Business Combinations [Abstract]
Value, Beginning balance	$ 1,595,273	$ 173,621
Purchase price contingent consideration	0	0
Contingent consideration payments	0	0
Change in fair value of contingent consideration	2,375,658	1,421,652
Value, Ending balance	$ 3,970,931	$ 1,595,273