Common Stock Warrants and Common Stock Warrant Liability (Details) - $ / shares		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Aug. 16, 2016	Mar. 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Jul. 31, 2015	Jun. 30, 2015
Number of Warrants, Outstanding		829,285	610,487
Class of Warrant or Right Issued		0	336,531
Class of Warrant or Right Exercised		0	117,733
Number of Warrants, Outstanding		829,285	829,285
Initial Public Offering Underwriter Warrants [Member]
Class of Warrant or Right Issued			187,500
Class of Warrant or Right, Date Issued			Dec. 31, 2016
Class of Warrant or Right, Expiration Term			5 years
Class of Warrant or Right, Exercise Price			$ 9.60
Marketing and Development Services Warrants [Member]
Class of Warrant or Right Issued			100,000
Class of Warrant or Right, Date Issued			Feb. 28, 2016
Class of Warrant or Right, Expiration Term	[1]		5 years
Class of Warrant or Right, Exercise Price			$ 7.50
Promissory Notes Warrants [Member]
Class of Warrant or Right Issued			9,031
Class of Warrant or Right, Date Issued			Mar. 31, 2016
Class of Warrant or Right, Expiration Term	[1]		3 years
Class of Warrant or Right, Exercise Price			$ 7.50
Other Advisory Services Warrants [Member]
Class of Warrant or Right Issued			40,000
Class of Warrant or Right, Date Issued			Aug. 31, 2016
Class of Warrant or Right, Expiration Term	[1]		3 years
Class of Warrant or Right, Exercise Price			$ 7.50
Common Stock Warrants [Member]
Class of Warrant or Right, Exercise Price		$ 7.50
Common Stock Warrant Issued To Initial Public Offering Underwriter [Member]
Class of Warrant or Right, Exercise Price			$ 9.60
August 2016 Other Advisory Services [Member]
Class of Warrant or Right, Exercise Price				$ 7.50
March 2016 Promissory Notes Common Stock Warrants [Member]
Class of Warrant or Right, Exercise Price					$ 7.50
Common Stock Warrant Issued for Marketing and Development Services [Member]
Class of Warrant or Right, Exercise Price						$ 7.50
Northern Arizona University Common Stock Warrant [Member]
Class of Warrant or Right, Exercise Price							$ 15.00
July 2015 Consulting Agreement Common Stock Warrant [Member]
Class of Warrant or Right, Exercise Price								$ 7.50
University of Arizona Common Stock Warrant [Member]
Class of Warrant or Right, Exercise Price									$ 7.50

[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.