Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary Of Significant Accounting Policies [Abstract]

Anti-Dilutive Shares Excluded From Computation Of Diluted Net Loss Per Share

	Year Ended December 31,
	2018		2017		2016
Common stock warrants		213,485		249,709		874,610
Common stock options		2,956,687		2,598,659		1,229,355
Restricted stock units		222,606		229,774		—
Total		3,392,778		3,078,142		2,103,965