Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 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		188,550			4.96
Exercised		-			-
Canceled		(5,496	)		13.01
Balance as of June 30, 2019		588,737		$	8.15		7.2	$	211
Exercisable as of June 30, 2019		376,922		$	9.36		5.9	$	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:

	Six Months Ended June 30,
	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 June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Research and development	$	31	$	19	$	46	$	34
General and administrative		82		33		127		54
Total stock-based compensation expense	$	113	$	52	$	173	$	88