Quarterly report pursuant to Section 13 or 15(d)

Revenue

Revenue

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

3.	Revenue

Disaggregation of Revenue

In general, the Company’s business segmentation is aligned according to the nature and economic characteristics of our services and provides meaningful disaggregation of each business segment’s results of operations. The nature of the Company’s performance obligations within our Treatment and Services Segments result in the recognition of our revenue primarily over time. The following tables present further disaggregation of our revenues by different categories for our Services and Treatment Segments:

Revenue by Contract Type
(In thousands)	Three Months Ended						Three Months Ended
	March 31, 2019						March 31, 2018
	Treatment		Services		Total		Treatment		Services		Total
Fixed price	$	9,905	$	428	$	10,333	$	8,959	$	90	$	9,049
Time and materials		―		1,375		1,375		―		3,609		3,609
Total	$	9,905	$	1,803	$	11,708	$	8,959	$	3,699	$	12,658

Revenue by generator
(In thousands)	Three Months Ended						Three Months Ended
	March 31, 2019						March 31, 2018
	Treatment		Services		Total		Treatment		Services		Total
Domestic government	$	7,913	$	686	$	8,599	$	6,536	$	3,118	$	9,654
Domestic commercial		1,879		758		2,637		2,423		402		2,825
Foreign government		57		337		394		―		153		153
Foreign commercial		56		22		78		―		26		26
Total	$	9,905	$	1,803	$	11,708	$	8,959	$	3,699	$	12,658

Contract Balances

The timing of revenue recognition, billings, and cash collections results in accounts receivable and unbilled receivables (contract assets). The Company’s contract liabilities consist of deferred revenues which represents advance 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:

(In thousands)	March 31, 2019		December 31, 2018		Year-to-date Change ($)			Year-to-date Change (%)
Contract assets
Account receivables, net of allowance	$	7,341	$	7,735	$	(394	)		(5.1	)%
Unbilled receivables - current		3,316		3,105		211			6.8	%

Contract liabilities
Deferred revenue	$	5,443	$	6,595	$	(1,152	)		(17.5	)%

Revenue recognized for the three months ended March 31, 2019 and 2018 that was included in the contract liability balance at the beginning of each year was $5,066,000 and $3,811,000, respectively. All revenue recognized in each period related to performance obligations satisfied within the respective period.

Remaining Performance Obligations

The Company applies the practical expedient in paragraph 606-10-50-14 and does not disclose information about remaining performance obligations that have original expected durations of one year or less.