Stock Option Plans, Shares Reserved and Warrants (Details 2)	Sep. 30, 2017 shares
Reserved shares of common stock for issuance upon exercise	12,983,329
2009 Equity Incentive Plan [Member]
Reserved shares of common stock for issuance upon exercise	8,494,277
RSU [Member]
Reserved shares of common stock for issuance upon exercise	1,300,000
Warrants [Member]
Reserved shares of common stock for issuance upon exercise	3,189,052