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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Summary of Significant Accounting Policies |
Schedule of cash and cash equivalents | Cash and cash equivalents consist of the following (in thousands):
|  | December 31,
|  | 2019 |  | 2018
Cash |  | $ | 2,530 |  | $ | 4,390
Money market fund |  |  | 5,432 |  |  | 5,956
Corporate debt securities |  |  | 1,937 |  |  | 1,948
Reverse repurchase agreements |  |  | — |  |  | 3,000
Total |  | $ | 9,899 |  | $ | 15,294
Schedule of reconciliation of cash, cash equivalents and restricted cash |
|  | December 31,
|  | 2019 |  | 2018
Cash and cash equivalents |  | $ | 9,899 |  | $ | 15,294
Restricted cash (1) |  |  | 477 |  |  | 113
Total |  | $ | 10,376 |  | $ | 15,407
(1) Included in prepaid expenses and other current assets and other assets as of December 31, 2019 and other assets as of December 31, 2018 in the consolidated balance sheets
Schedule of stock-based compensation expense | During the years ended December 31, 2019 and 2018, 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,
|  | 2019 |  | 2018
Research and development |  | $ | 616 |  | $ | 673
General and administrative |  |  | 896 |  |  | 1,098
Total |  | $ | 1,512 |  | $ | 1,771
Schedule of anti-dilutive common stock equivalents excluded from calculation of diluted net loss per share |
|  | Year Ended December 31,
|  | 2019 |  | 2018
Stock options |  | 785,832 |  | 433,389
Common stock warrants |  | 6,193,749 |  | 4,202,449
|  | 6,979,581 |  | 4,635,838

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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