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Summary of significant accounting policies (Tables)

6 Months Ended

Jun. 30, 2021

Accounting Policies [Abstract]

Reconciliation of cash

​

​	​	​	​	​	​	​
​		End of			​	Beginning of
​		period-			period-
​		June 30,			December 31,
​		2021		​	2020
Cash and cash equivalents	​	$	177,347	​	$	208,812
Restricted cash included in deposits and other assets	​		7,500	​		7,500
Total Cash, cash equivalents and restricted cash per statement of cash flows	​	$	184,847	​	$	216,312

Schedule of Inventory

​

​	​	​	​	​	​	​
​		June 30, 2021			December 31, 2020
Raw materials	​	$	687	​	$	824
Work in progress	​		8,840	​		8,745
Finished goods	​		6,914	​		9,128
Total inventory	​	$	16,441	​	$	18,697

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

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