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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Summary of Significant Accounting Policies

Schedule of cash and cash equivalents and restricted cash

The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the condensed consolidated balance sheets that equate to the amount reported in the condensed consolidated statement of cash flows as of the beginning and end of the nine month period ended September 30, 2019 (in thousands):

​	​	​	​	​	​	​	​
​	​	​	September 30,		​	December 31,
​	​	​	2019		​	2018
Cash and cash equivalents	​	$	39,534	​	$	29,821	​
Restricted cash	​	​	8,881	​	​	8,775	​
Cash, cash equivalents and restricted cash in the condensed consolidated statements of cash flows	​	$	48,415	​	$	38,596	​

Schedule of potentially dilutive securities not included in the calculation of diluted net loss per share attributable to common stockholders

Potentially dilutive securities not included in the calculation of diluted net loss per share because to do so would be anti-dilutive were as follows (in common stock equivalent shares, in thousands):

​	​	​	​	​	​	​	​	​	​
​	​	Three Months Ended			​	Nine Months Ended			​
​	​	September 30,			​	September 30,
​		2019		2018		2019		2018	​
Stock options outstanding	​	3,602	​	4,781	​	3,636	​	5,707	​
Unvested restricted stock units	​	232	​	196	​	364	​	355	​
Employee stock purchase plan	​	1	​	15	​	5	​	42	​
​	​	3,835	​	4,992	​	4,005	​	6,104	​

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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.

+ 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

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Tabular disclosure of the components of cash and cash equivalents.

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