Revenue (Tables)

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Revenue by Contract Type
(In thousands)	Three Months Ended						Three Months Ended
	September 30, 2023						September 30, 2022
	Treatment		Services		Total		Treatment		Services		Total
Fixed price	$	10,795	$	10,188	$	20,983	$	8,877	$	6,892	$	15,769
Time and materials		-		894		894		-		2,703		2,703
Total	$	10,795	$	11,082	$	21,877	$	8,877	$	9,595	$	18,472

Revenue by Contract Type
(In thousands)	Nine Months Ended						Nine Months Ended
	September 30, 2023						September 30, 2022
	Treatment		Services		Total		Treatment		Services		Total
Fixed price	$	33,223	$	29,995	$	63,218	$	24,749	$	20,569	$	45,318
Time and materials		-		3,798		3,798		-		8,524		8,524
Total	$	33,223	$	33,793	$	67,016	$	24,749	$	29,093	$	53,842

Revenue by generator
(In thousands)	Three Months Ended						Three Months Ended
	September 30, 2023						September 30, 2022
	Treatment		Services		Total		Treatment		Services		Total
Domestic government	$	7,095	$	8,444	$	15,539	$	5,728	$	9,264	$	14,992
Domestic commercial		3,450		2,170		5,620		2,806		313		3,119
Foreign government		250		445		695		287		-		287
Foreign commercial		-		23		23		56		18		74
Total	$	10,795	$	11,082	$	21,877	$	8,877	$	9,595	$	18,472

Revenue by generator
(In thousands)	Nine Months Ended						Nine Months Ended
	September 30, 2023						September 30, 2022
	Treatment		Services		Total		Treatment		Services		Total
Domestic government	$	24,160	$	29,603	$	53,763	$	17,786	$	28,158	$	45,944
Domestic commercial		7,925		3,509		11,434		6,045		859		6,904
Foreign government		1,002		615		1,617		532		12		544
Foreign commercial		136		66		202		386		64		450
Total	$	33,223	$	33,793	$	67,016	$	24,749	$	29,093	$	53,842

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 payment from customers in advance of the completion of our performance obligation. The following table represents changes in our contract assets and contract liabilities balances. Our deferred revenue balance at September 30, 2023 included a $2,500,000 invoice to a certain customer for a waste treatment project which is expected to commence and be completed in 2024.

					Year-to-date		Year-to-date
(In thousands)	September 30, 2023		December 31, 2022		Change ($)		Change (%)
Contract assets
Unbilled receivables - current	$	9,336	$	6,062	$	3,274		54.0	%
Contract liabilities
Deferred revenue	$	7,765	$	4,813	$	2,952		61.3	%