Summary of Significant Accounting Policies (Net Loss Per Share) (Tables)

12 Months Ended

Dec. 31, 2017

Summary Of Significant Accounting Policies Net Loss Per Share Tables

Net Loss Per Share (Tables)

The components of basic and diluted net loss per share were as follows (in thousands, except loss per share data):

		Year Ended December 31,
Numerator:		2017		2016		2015
Net loss available for common shareholders	$	(24,243)	$	(16,472)	$	(14,542)
Denominator:
Weighted-average common shares outstanding		72,786		51,958		46,540
Net loss per share - basic and diluted	$	(0.33)	$	(0.32)	$	(0.31)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The shares shown represent the number of shares of common stock which would be issued upon conversion in the respective years shown below (in thousands):

	Year Ended December 31,
	2017	2016	2015
Options outstanding and warrants exercisable	7,007	7,764	8,185
Nonvested restricted stock units	185	60	60
	7,192	7,824	8,245