Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity and Related Information

A summary of the Company’s stock option activity and related information is as follows:

	Options Outstanding
	Stock Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (000's)
Balance as of December 31, 2018		405,683		$	9.69		6.5	$	-
Granted		135,972			3.97
Exercised		-			-
Canceled		(2,953	)		12.60
Balance as of March 31, 2019		538,702		$	8.23		7.2	$	175
Exercisable as of March 31, 2019		373,777		$	9.43		6.1	$	-

Grant Date Fair Value of Employee Stock Options Estimated Using Black-Scholes Option-Pricing Model with Weighted-Average Assumptions

The grant date fair value of employee stock options was estimated using a Black-Scholes option-pricing model with the following weighted-average assumptions:

	Three Months Ended March 31,
	2019			2018
Expected term (in years)		6.0			6.0
Expected volatility		75	%		75	%
Risk-free interest rate		2.5	%		2.6	%
Expected dividend yield		-	%		-	%

Total Stock-Based Compensation Expense Recognized in Condensed Consolidated Statements of Operations

Total stock-based compensation expense recognized in the condensed consolidated statements of operations is as follows (in thousands):

	Three Months Ended March 31,
	2019		2018
Research and development	$	15	$	21
General and administrative		45		15
Total stock-based compensation expense	$	60	$	36