Organization and Summary of Significant Accounting Policies (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue Recognition [Abstract]
Four criteria needed for Company to recognize revenue			(i) persuasive evidence that an agreement exists; (ii) delivery of the products and/or services has occurred; (iii) the selling price is fixed or determinable; and (iv) collectability is reasonably assured.
Net loss	$ (10,684)	$ (8,737)	$ (30,455)	$ (25,522)
Potentially dilutive securities (in shares)	20,500,000	4,600,000	20,500,000	4,600,000
Common stock issuable upon the exercise of outstanding options	6,200,000	4,500,000	6,200,000	4,500,000
Class A Convertible Preferred Stock
Revenue Recognition [Abstract]
Shares associated with a hypothetical conversion of convertible preferred stock	14,100,000		14,100,000
Employee Stock Option
Revenue Recognition [Abstract]
Anti-dilutive securities (in shares)	0	0	0	4,378