Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Summary of Significant Accounting Policies

Schedule of stock-based compensation expense

During the three and nine months ended September 30, 2019 and 2018, the Company recorded stock-based compensation expense, which was allocated as follows in the condensed consolidated statements of operations (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Research and development	$	162	$	168	$	462	$	505
General and administrative		216		248		765		835
Total	$	378	$	416	$	1,227	$	1,340

Schedule of anti-dilutive common stock equivalents excluded from calculation of diluted net loss per share

	Three Months Ended September 30,		Nine Months Ended September 30,
	2019	2018	2019	2018
Stock options	843,183	448,946	843,183	448,946
Common stock warrants	6,193,749	4,202,457	6,193,749	4,202,457
	7,036,932	4,651,403	7,036,932	4,651,403

Schedule of reconciliation of cash, cash equivalents and restricted cash

	September 30,
	2019		2018
Cash and cash equivalents	$	17,765	$	19,876
Restricted cash (1)		113		113
Total	$	17,878	$	19,989

(1) Included in prepaid expenses and other current assets as of September 30, 2019 and other assets as of September 30, 2018 in the condensed consolidated balance sheets