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Revenue (Tables)
 3 Months Ended
Mar. 31, 2023
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue

 

Revenue by Contract Type                        
(In thousands)  Three Months Ended   Three Months Ended 
   March 31, 2023   March 31, 2022 
   Treatment   Services   Total   Treatment   Services   Total 
Fixed price  $9,594   $8,647   $18,241   $7,479   $5,761   $13,240 
Time and materials   —    1,866    1,866    —    2,675    2,675 
Total  $9,594   $10,513   $20,107   $7,479   $8,436   $15,915 

 

Revenue by generator                        
(In thousands)  Three Months Ended   Three Months Ended 
   March 31, 2023   March 31, 2022 
   Treatment   Services   Total   Treatment   Services   Total 
Domestic government  $7,257   $9,718   $16,975   $5,815   $8,245   $14,060 
Domestic commercial   2,206    597    2,803    1,436    162    1,598 
Foreign government   95    177    272    92    6    98 
Foreign commercial   36    21    57    136    23    159 
Total  $9,594   $10,513   $20,107   $7,479   $8,436   $15,915 
Schedule of Contract Liabilities

The timing of revenue recognition and billings results in unbilled receivables (contract assets). The Company’s contract liabilities consist of deferred revenues which represent advance payment from customers in advance of the completion of our performance obligation. The following table represents changes in our contract asset and contract liabilities balances:

 

           Year-to-date   Year-to-date 
(In thousands)  March 31, 2023   December 31, 2022   Change ($)   Change (%) 
Contract assets                    
Unbilled receivables - current  $6,701   $6,062   $639    10.5%
                     
Contract liabilities                    
Deferred revenue  $5,003   $4,813   $190    3.9%