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Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2021

Summary of Significant Accounting Policies

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

​

​	​	​	​	​
​	​	Three and Six Months Ended June 30,
​		2021		2020
Series X Preferred Stock (1)	​	32,545,203	​	—
Stock options		7,930,334		1,301,262
Common stock warrants		9,183,885		6,193,749
​		49,659,422	​	7,495,011

(1)    Shown as common stock equivalents

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):

​

​	​	​	​	​	​	​
​	​	June 30,
​		2021			2020
Cash and cash equivalents	​	$	139,520	​	$	51,885
Restricted cash (1)	​	​	121	​	​	235
Total	​	$	139,641	​	$	52,120

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

​

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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.

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Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage.

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