Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Inventory (Details)

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Summary of Significant Accounting Policies - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Accounting Policies [Abstract]    
Chemical washing solutions $ 5,708 $ 6,490
Other 33 52
Total inventory, gross 5,741 6,542
Reserve for obsolescence (108) (127)
Total inventory, net $ 5,633 $ 6,415