Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Significant Accounting Policies

Schedule of cash and cash equivalents

Cash and cash equivalents consist of the following (in thousands):

	December 31,
	2020		2019
Cash	$	1,931	$	2,530
Money market fund		22,999		5,432
Corporate debt securities		—		1,937
Total	$	24,930	$	9,899

Schedule of reconciliation of cash, cash equivalents and restricted cash

The reconciliation of cash, cash equivalents and restricted cash reported within the applicable balance sheet that sum to the total of the same such amount shown in the statement of cash flows is as follows (in thousands):

	December 31,
	2020		2019
Cash and cash equivalents	$	24,930	$	9,899
Restricted cash (1)		121		477
Total	$	25,051	$	10,376

(1) Included in prepaid expenses and other current assets and other assets.

Schedule of stock-based compensation expense

During the years ended December 31, 2020 and 2019, the Company recorded stock-based compensation expense for employee and non-employee stock options and restricted stock, which was allocated as follows in the statements of operations (in thousands):

	Year Ended December 31,
	2020		2019
Research and development	$	599	$	616
General and administrative		790		896
Total	$	1,389	$	1,512

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

	Year Ended December 31,
	2020	2019
Stock options	1,367,667	785,832
Common stock warrants	6,193,749	6,193,749
	7,561,416	6,979,581