Common Stock Warrants and Common Stock Warrant Liability (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended				3 Months Ended	9 Months Ended
	Aug. 16, 2016	Dec. 31, 2016	Mar. 31, 2016	Feb. 29, 2016	Jul. 31, 2015	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Nov. 30, 2015	Sep. 30, 2015
Share price (in dollars per share)		$ 8.15				$ 1.85	$ 1.85
Fair value adjustment of warrants						$ 30	$ (65)	$ (51)
Minimum [Member]
Expected term							3 years
Maximum [Member]
Expected term							3 years 6 months
Common Stock Warrants [Member]
Number of shares purchased						270,400	270,400
Exercise price (in dollars per share)						$ 7.50	$ 7.50
Warrant term							5 years
Description of method used							Monte Carlo option pricing model
Expected volatility rate, minimum							58.00%
Expected volatility rate, maximum							76.70%
Risk free interest rate, minimum							1.31%
Risk free interest rate, maximum							1.76%
Common Stock Warrants [Member] | Minimum [Member]
Share price (in dollars per share)						7.50	$ 7.50
Common Stock Warrants [Member] | Maximum [Member]
Share price (in dollars per share)						7.575	$ 7.575
Common Stock Warrant Issued for Marketing and Development Services [Member]
Number of shares purchased				100,000
Exercise price (in dollars per share)				$ 7.50
Warrant term				5 years
Description of method used				Black- Scholes option pricing model
Share price (in dollars per share)				$ 7.57
Fair value of common stock warrant				$ 431
Expected volatility rate				77.80%
Expected term				3 years 9 months
Expected dividend rate				0.00%
Risk free interest rate				2.09%
March 2016 Promissory Notes Common Stock Warrants [Member]
Number of shares purchased									9,032
Exercise price (in dollars per share)									$ 7.50
Warrant term			3 years
Description of method used			Monte Carlo pricing model
Share price (in dollars per share)									$ 7.575
Expected volatility rate			79.60%
Risk free interest rate			1.49%
August 2016 Other Advisory Services [Member]
Number of shares purchased	20,000
Exercise price (in dollars per share)	$ 7.50
Warrant term	3 years
Common Stock Warrant Issued To Initial Public Offering Underwriter [Member]
Number of shares purchased		187,500
Exercise price (in dollars per share)		$ 9.60
Warrant term		5 years
Description of method used		Black- Scholes option pricing model
Share price (in dollars per share)		$ 8.00
Fair value of common stock warrant		$ 939
Expected volatility rate		82.10%
Expected term		5 years
Expected dividend rate		0.00%
Risk free interest rate		1.92%
University of Arizona Common Stock Warrant [Member]
Number of shares purchased											15,000
Exercise price (in dollars per share)											$ 7.50
Warrant term							5 years
Description of method used							Monte Carlo option pricing model
Share price (in dollars per share)						$ 7.91	$ 7.91
Expected volatility rate							77.70%
Expected dividend rate							0.00%
Risk free interest rate							1.93%
Derivative liability						$ 4	$ 4				$ 53
Fair value adjustment of warrants							$ 65
July 2015 Consulting Agreement Common Stock Warrant [Member]
Number of shares purchased					121,227
Exercise price (in dollars per share)					$ 7.50
Warrant term					10 years
Description of method used					Black-Scholes option pricing model
Share price (in dollars per share)					$ 7.575
Fair value of common stock warrant					$ 537
Expected volatility rate					60.90%
Expected term					6 years 3 months
Expected dividend rate					0.00%
Risk free interest rate					2.09%
Northern Arizona University Common Stock Warrant [Member]
Number of shares purchased										210,526
Exercise price (in dollars per share)										$ 15.00