Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Allocation of Stock-Based Compensation Expenses

The table below summarizes the total stock-based compensation expense included in the Company’s consolidated statements of operations for the periods presented:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017

Research and development	$	38,000	$	32,000	$	113,000	$	133,000
General and administrative		82,000		66,000		253,000		435,000
Total stock-based compensation	$	120,000	$	98,000	$	366,000	$	568,000

Summary of Stock Option Activity

Stock option transactions during the nine months ended September 30, 2018 are presented below:



					Weighted
					Average
			Weighted		Remaining
			Average		Contractual		Aggregate
			Exercise		Term		Intrinsic
	Shares		Price		(Years)		Value
Outstanding at December 31, 2017		1,115,865	$	3.17		8.98
Granted		36,500		1.20
Forfeited/Cancelled		(3,201)		11.02
Outstanding at September 30, 2018		1,149,164	$	3.08		8.28	$	118,000
Vested and expected to vest at September 30, 2018		864,051	$	3.80		8.03	$	90,000
Exercisable at September 30, 2018		361,773	$	6.20		6.77	$	39,000

Shares Reserved for Future Issuance

As of September 30, 2018, the Company had reserved shares of its common stock for future issuance as follows:



	Shares Reserved
Stock options outstanding		1,149,164
Employee stock purchase plan		47,172
Available for future grants under the 2016 Plan		447,127
Warrants outstanding		8,294,827
Total shares reserved		9,938,290