Annual report pursuant to Section 13 and 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
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]    
Chemical washing solutions $ 6,406 $ 6,490
Other 52 52
Total inventory, gross 6,458 6,542
Reserve for obsolescence (124) (127)
Total inventory, net $ 6,334 $ 6,415