Stockholders’ Equity - Warrants (Details) - USD ($)		1 Months Ended
	Jul. 06, 2018	Jun. 30, 2015	Dec. 31, 2010
Warrants to Purchase Series A Redeemable Convertible Preferred Stock [Member] | SVB Credit Facility [Member]
Warrants
Number of shares the warrant can be converted to			9,229
Warrant exercise price			$ 26.00
Warrants to Purchase Series B Redeemable Convertible Preferred Stock [Member] | 2015 Credit Facility [Member]
Warrants
Number of shares the warrant can be converted to		18,461
Warrant exercise price		$ 26.00
Warrant exercise expiration period		10 years
Warrants to Purchase Series B Redeemable Convertible Preferred Stock [Member] | SVB Credit Facility [Member]
Warrants
Number of shares the warrant can be converted to	9,375
Warrant exercise price	$ 8.91
Fair Value Of Warrants	$ 43,000
Warrant exercise expiration period	5 years