Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31,
	2019		2018

Research and development	$	28,000	$	37,000
General and administrative		71,000		85,000
Total stock-based compensation	$	99,000	$	122,000

Summary of Stock Option Activity

Stock option transactions during the three months ended March 31, 2019 are presented below:



					Weighted
					Average
			Weighted		Remaining
			Average		Contractual		Aggregate
			Exercise		Term		Intrinsic
	Shares		Price		(Years)		Value
Outstanding at December 31, 2018		1,150,065	$	3.08		8.03	$	-
Granted		-		-
Forfeited/Cancelled		(286,173)		0.95
Outstanding at March 31, 2019		863,892	$	3.79		7.54	$	-
Vested and expected to vest at March 31, 2019		863,892	$	3.79		7.54	$	-
Exercisable at March 31, 2019		502,392	$	5.11		6.83	$	-

Shares Reserved for Future Issuance

As of March 31, 2019, the Company had reserved shares of its common stock for future issuance as follows:



	Shares Reserved
Stock options outstanding		863,892
Employee stock purchase plan		76,472
Available for future grants under the 2016 Plan		2,347,099
Warrants outstanding		26,480,505
Total shares reserved		29,767,968