Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Cash and cash equivalents balance outside of FDIC limit $ 52,578    
Restricted cash 6,333   $ 6,842
Accounts receivable, allowance for doubtful accounts 258   416
Heights Union      
Balance remaining in the escrow account $ 83   842
Minimum      
Age of doubtful accounts 30 days    
Maximum      
Age of doubtful accounts 60 days    
Standby Letters of Credit | Heights Union      
Collateral amount $ 250 $ 250  
Restricted Cash      
Collateral amount $ 6,000   $ 6,000