Stockholders' Equity And Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

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, 2016	1,229	$	3.82	7.6
Options granted	58		8.60
Options exercised	(4)		4.00
Options canceled	—		—
Options expired	—		—
Balances — March 31, 2017	1,283	$	4.03	7.5
Exercisable	419

Total Stock-Based Compensation Expense

	Three-Month Periods Ended
	March 31,
	2017		2016
General and administrative	$	204	$	148
Research and development		59		45
Total stock-based compensation expense	$	263	$	193

Schedule Of Fair Value Of Employee Stock Options

	Three-Month Periods Ended March 31,
	2017	2016
Expected term in years	5.8 - 6.1	6.1
Expected volatility	80%	80%
Risk-free interest rate	2.0 - 2.1%	1.50%
Dividend yield	—	—