Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Concentrations (Details)

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Commitments and Contingencies - Concentrations (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jul. 31, 2018
USD ($)
a
ft²
Dec. 31, 2019
USD ($)
item
Jun. 30, 2020
USD ($)
Jul. 09, 2019
USD ($)
Sep. 30, 2018
ft²
Sep. 20, 2018
ft²
Concentrations            
Size of building space | ft² 70,000          
Area of land where building resides | a 8.6          
Payments to acquire Land $ 731          
Payments to acquire Building $ 4,300          
Design build agreement            
Concentrations            
Estimated cost relating to design build agreement       $ 29,000    
Additional costs associated with design build agreement       14,400    
Expenses related to improvements   $ 6,066        
Maximum | Design build agreement            
Concentrations            
Receivable economic development grants from state and local authorities       2,685    
Cash grants       $ 1,250    
Vendor            
Concentrations            
Number of products from which revenue is derived | item   4        
Heights Union            
Concentrations            
Size of building space | ft²           1,500
Area of land where building resides | ft²         75,000  
Expenses related to improvements   $ 441        
Heights Union | Expected | Maximum            
Concentrations            
Expenses related to improvements     $ 9,833