Common Stock Warrants and Common Stock Warrant Liability (Tables)

6 Months Ended

Jun. 30, 2017

Warrants and Rights Note Disclosure [Abstract]

Schedule of common stock warrant activity

The table summarizes the common stock warrant activity as of June 30, 2017 as follows: 

	Number
	of		Date
Common  Stock Warrants	Warrants		Issued	Term		Exercise Price
Outstanding at December 31,		610,487
Initial Public Offering Underwriter		187,500	December 2016		5  years	$	9.60
Marketing and Development Services		100,000	February 2016		5 years(1)	$	7.50
Other Advisory Services		40,000	August 2016		3 years(1)	$	7.50
Promissory Notes		9,031	March 2016		3 years(1)	$	7.50
Warrants issued		336,531
Warrants exercised		117,733
Outstanding at December 31, 2016		829,285
Warrants issued		—
Warrants exercised		—
Outstanding at June 30, 2017		829,285

(1) The warrants also terminate, if not exercised (i) within two years of the closing of an initial public offering of common stock; or (ii) a liquidation, dissolution or winding up of the Company.