Stockholders' Equity And Stock-Based Compensation (Narrative) (Details) - USD ($)				1 Months Ended	7 Months Ended	12 Months Ended
	Feb. 07, 2017	May 23, 2016	Nov. 06, 2014	Nov. 30, 2014	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Oct. 05, 2016	Jun. 21, 2016	May 31, 2016	Jun. 30, 2015
Stockholders' Equity [Line Items]
Preferred Stock, shares authorized						5,000,000	5,000,000
Preferred Stock, par value						$ 0.001	$ 0.001
Preferred Stock, shares outstanding						0	0
Common stock, shares authorized						45,000,000	45,000,000
Common stock, par value						$ 0.001	$ 0.001
Common stock, shares issued				3,444,198		13,315,000	7,565,000
Common stock, shares outstanding						13,315,000	7,565,000
Proceeds from issuance of common stock					$ 8,000
Exercise price of warrants			$ 2.67
Exercisable period of warrants or rights					7 years
Value of warrants			$ 600,000
Aggregate issuance costs			$ 900,000
Exercise price						$ 3.34
Executive ownership percentage of diluted shares of common stock outstanding							3.00%
Aggregate intrinsic value exercisable options						$ 1,100,000
Fair value of options vested						1,200,000	$ 3,100,000
Stock-based compensation						870,000	402,000
Unrecognized compensation cost						$ 2,400,000
Weighted average remaining contractual life						2 years 10 months 2 days
MDB Capital Group, LLC [Member]
Stockholders' Equity [Line Items]
Proceeds from issuance of common stock						$ 8,000
Placement agent fee percentage			10.00%
Placement agent fees			$ 800,000
Legal fees and reimbursable expenses			54,000
General And Administrative [Member]
Stockholders' Equity [Line Items]
Stock-based compensation						674,000	397,000
Research And Development [Member]
Stockholders' Equity [Line Items]
Stock-based compensation						$ 196,000	$ 5,000
Stock Options [Member]
Stockholders' Equity [Line Items]
Exercise price						$ 3.34
Number of shares terminated						50,998
Stock Options [Member] | 2015 Plan [Member]
Stockholders' Equity [Line Items]
Common stock, shares issued											1,134,818
Vesting period						4 years
Stock option grant, vest rate upon first anniversary						25.00%
Stock option grant, vest rate per quarter thereafter						8.33%
Stock Options [Member] | 2015 Plan [Member] | Maximum [Member]
Stockholders' Equity [Line Items]
Vesting period						10 years
Executive Amendment [Member]
Stockholders' Equity [Line Items]
Exercise price								$ 4.00
Initial Public Offering [Member]
Stockholders' Equity [Line Items]
Common stock, shares issued										5,749,846
Private Placement [Member]
Stockholders' Equity [Line Items]
Proceeds from issuance of common stock			$ 8,000,000
Price per share			$ 2.67
Offering consideration					$ 7,147,000
Private Placement [Member] | Subsequent Event [Member]
Stockholders' Equity [Line Items]
Common stock, par value	$ 0.001
Proceeds from sale of stock to acquire business and intellectual property	$ 5,000,000
Underwriters [Member] | Initial Public Offering [Member] | Stock Options [Member]
Stockholders' Equity [Line Items]
Number of shares of common stock called by issuance of warrants, outstanding						574,985
Price per share						$ 5.00
Period the warrants are exercisable after issuance						180 days
Exercisable period of warrants or rights						5 years
Dividend yield						0.00%
Expected volatility						80.00%
Expected term						5 years
Underwriters [Member] | Initial Public Offering [Member] | Stock Options [Member] | Minimum [Member]
Stockholders' Equity [Line Items]
Fair value of common stock per share						$ 4.12
Risk-free interest rate						1.22%
Underwriters [Member] | Initial Public Offering [Member] | Stock Options [Member] | Maximum [Member]
Stockholders' Equity [Line Items]
Fair value of common stock per share						$ 4.27
Risk-free interest rate						1.38%
Common Stock Warrants [Member]
Stockholders' Equity [Line Items]
Exercisable period of warrants or rights						7 years
Number of shares terminated
Aggregate intrinsic value exercisable options						$ 2,000,000
Common Stock Warrants [Member] | Private Placement [Member]
Stockholders' Equity [Line Items]
Shares sold			299,625
Common Stock [Member]
Stockholders' Equity [Line Items]
Common stock, shares outstanding					7,565,000	13,315,000	7,565,000
Shares sold		5,000,000			1,125,000	5,750,000
Proceeds from sale of stock to acquire business and intellectual property				$ 9,200,000
Price per share		$ 4.00							$ 4.00
Common Stock [Member] | MDB Capital Group, LLC [Member]
Stockholders' Equity [Line Items]
Shares sold						1,125,000
Common Stock [Member] | Executive Amendment [Member]
Stockholders' Equity [Line Items]
Optional shares to be granted							187,286
Common Stock [Member] | Private Placement [Member]
Stockholders' Equity [Line Items]
Shares sold			2,996,253
Offering consideration					$ 3,000
MDB Capital Group, LLC [Member]
Stockholders' Equity [Line Items]
Exercise price of warrants					$ 2.67
Placement agent fees					$ 800,000
Offering consideration					$ 1,000
MDB Capital Group, LLC [Member] | Initial Public Offering [Member]
Stockholders' Equity [Line Items]
Value of warrants						$ 1,400,000
MDB Capital Group, LLC [Member] | Common Stock [Member]
Stockholders' Equity [Line Items]
Number of shares of common stock called by issuance of warrants, outstanding					299,625