Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Concentrations (Details)

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Commitments and Contingencies - Concentrations (Details)
$ in Thousands
1 Months Ended 3 Months Ended
Jul. 31, 2018
USD ($)
ft²
a
Mar. 31, 2020
USD ($)
item
Mar. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
Jul. 09, 2019
USD ($)
Sep. 30, 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          
Estimated cost relating to design build agreement   $ 4,457     $ 29,000  
Additional costs associated with design build agreement         13,000  
Construction in progress.   10,523        
Acquisition of fixed assets in accounts payable and accrued expenses   3,674 $ 946      
Heights Union            
Concentrations            
Area of land where building resides | ft²           75,000
Expenses related to improvements   494 $ 935      
Design build agreement            
Concentrations            
Proceeds from grants   $ 238        
Maximum | Design build agreement            
Concentrations            
Receivable economic development grants from state and local authorities         2,685  
Cash grants         $ 1,250  
Expected | Maximum | Heights Union            
Concentrations            
Expenses related to improvements       $ 7,800    
Vendor            
Concentrations            
Number of products from which revenue is derived | item   4