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Summary of significant accounting policies (Tables)

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Reconciliation of cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheet that sum to the total of the same amounts shown in the statement of cash flows:

​

​	​	​	​	​	​	​
​		Beginning of			​	​
​		period-			End of period-
​		December 31,			September 30,
​		2019		​	2020
Cash and cash equivalents	​	$	288,028	​	$	433,970
Restricted cash included in deposits and other assets	​		7,500	​		7,500
Total Cash, cash equivalents and restricted cash per statement of cash flows	​	$	295,528	​	$	441,470

Schedule of Inventory

The following table summarizes the components of the Company’s inventory for the periods indicated:

​	​	​	​	​	​	​
​		September 30, 2020			December 31, 2019
Raw materials	​	$	946	​	$	874
Work in progress	​		8,600	​		9,652
Finished goods	​		9,935	​		8,759
Total inventory	​	$	19,481	​	$	19,285

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Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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