Stockholders' Equity And Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders' Equity And Stock-Based Compensation [Abstract]

Summary Of Stock Option Activity

	Stock Options Outstanding
			Weighted	Weighted average
	Number		average	remaining life
	of shares		exercise price	(in years)
Balances — December 31, 2015	875	$	3.51	7.77
Options granted	171		4.12
Options exercised	—		—
Options canceled	(6)		4.00
Options expired	(19)		2.67
Balances — June 30, 2016	1,021	$	3.63	7.76
Exercisable	142

Total Stock-Based Compensation Expense

	Three-Month Periods Ended				Six-Month Periods Ended
	June 30,				June 30,
	2016		2015		2016		2015
General and administrative	$	147	$	107	$	295	$	161
Research and development		49		—		94		—
Total stock-based compensation expense	$	196	$	107	$	389	$	161

Schedule Of Fair Value Of Employee Stock Options

	Three-Month Periods Ended June 30,		Six-Month Periods Ended June 30,
	2016	2015	2016	2015
Expected term in years	6.1	3.6	6.1	3.6
Expected volatility	80%	89%	80%	89%
Risk-free interest rate	1.31%	1.18%	1.39%	0.94%
Dividend yield	—	—	—	—