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Summary of significant accounting policies (Tables)
3 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]  
Reconciliation of cash

    

End of

    

Beginning of

 

period-

 

period-

 

March 31, 

 

December 31, 

 

2022

2021

Cash and cash equivalents

$

144,178

$

189,718

Restricted cash included in deposits and other assets

 

7,500

 

7,500

Total Cash, cash equivalents and restricted cash per statement of cash flows

$

151,678

$

197,218

Schedule of Inventory

    

March 31, 2022

    

December 31, 2021

Raw materials

$

1,501

$

1,418

Work in progress

 

8,070

 

7,721

Finished goods

 

5,710

 

6,717

Total inventory

$

15,281

$

15,856