Revenue

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Revenue by Geography

Substantially all of the Company’s revenue for the three months ending March 31, 2022 and 2021 was derived from services performed within the United States. No other country represented more than 10% of total revenue for either period.

Unsatisfied Performance Obligations

As of March 31, 2022, the aggregate amount of transaction price allocated to the unsatisfied performance obligations was $168.5 million. The Company expects to recognize this revenue over the remaining contract term of the individual projects, with contract terms generally ranging from one month to 9.3 years. The amount of unsatisfied performance obligations is lower than the potential contractual revenue since it excludes revenue that is constrained. Revenue amounts excluded due to constraints include those amounts under contracts that are wholly unperformed in which the customer has a unilateral right to cancel the arrangement, or that require the Company to undertake numerous activities to fulfill the performance obligations, including various activities that are outside of the Company’s control.

Timing of Billing and Performance

During the three months ended March 31, 2022 and 2021, the Company recognized approximately $2.6 million and $1.7 million of revenue that was included in the deferred revenue balance at the beginning of the periods, respectively. During the three months ended March 31, 2022 and 2021, revenue recognized from performance obligations partially satisfied in previous periods was $0.4 million and $1.5 million, respectively. These cumulative catch-up adjustments primarily related to contract modifications executed in the current period, which resulted in changes to the transaction price and changes in estimates such as estimated total costs.

Accounts Receivable, Unbilled Services, and Deferred Revenue

Accounts receivable and unbilled services (including contract assets) consisted of the following:

(In thousands)	March 31, 2022		December 31, 2021
Accounts receivable	$	8,724	$	8,143
Unbilled services	1,589		2,825
Total accounts receivable and unbilled services	10,313		10,968
Allowance for doubtful accounts	(180)		(269)
Total accounts receivable and unbilled services, net	$	10,133	$	10,699

As of March 31, 2022 and December 31, 2021, contract assets of $1.6 million and $2.8 million, respectively, were included in unbilled services.

Deferred revenue as of March 31, 2022 and December 31, 2021 was $7.5 million and $7.6 million, respectively. Quarter over quarter changes in the Company’s accounts receivable, unbilled services and deferred revenue balances were impacted by timing differences between the Company’s satisfaction of performance obligations under its contracts, achievement of billing milestones, and customer payments.

Concentration of Credit Risk

Financial assets that subject the Company to credit risk primarily consist of cash and cash equivalents, accounts receivable and unbilled services. Based on the short-term nature and historical realization of the financial assets, as well as the reputable credit ratings of the financial institutions holding the deposits, the Company believes it bears minimal credit risk.

For the three months ended March 31, 2022 and 2021, three customers individually (totaling 48.9% and 80.6%, respectively) accounted for greater than 10% of revenue. As of March 31, 2022 and December 31, 2021, three customers individually (totaling 64.1% and 78.4%, respectively) accounted for greater than 10% of accounts receivable, net.