Revenue (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

The following table disaggregates our sales by major source (in thousands):


	Three Months Ended March 31, 2024						Three Months Ended March 31, 2023
Category	Oil & Gas Proppants		Industrial & Specialty Products		Total Sales		Oil & Gas Proppants		Industrial & Specialty Products		Total Sales
Product	$	119,024	$	142,770	$	261,794	$	201,787	$	142,227	$	344,014
Service	64,148		—		64,148		98,226		—		98,226
Total Sales	$	183,172	$	142,770	$	325,942	$	300,013	$	142,227	$	442,240

Schedule of Changes in Contract Assets and Liabilities

The following tables reflect the changes in our contract assets, which we classify as unbilled receivables and our contract liabilities, which we classify as deferred revenues, for the three months ended March 31, 2024 and 2023 (in thousands):


	Unbilled Receivables
	March 31, 2024		March 31, 2023
Beginning Balance	$	—	$	—
Reclassifications to billed receivables	—		—
Revenues recognized in excess of period billings	159		—
Ending Balance	$	159	$	—


	Deferred Revenue
	March 31, 2024		March 31, 2023
Beginning Balance	$	15,512	$	30,752
Revenues recognized from balances held at the beginning of the period	(1,830)		(5,569)
Revenues deferred from period collections on unfulfilled performance obligations	—		—
Revenues recognized from period collections	—		—
Ending Balance	$	13,682	$	25,183

Schedule of Total Sales, Pre-tax Income and Net Income Related to Foreign Operations

The following table includes information related to our foreign operations (in thousands):


	Three Months Ended March 31, 2024		Three Months Ended March 31, 2023
Total Sales	$	21,470	$	29,932
Pre-tax income	$	6,947	$	6,902
Net income	$	5,488	$	5,452

U.S. SILICA HOLDINGS, INC. 10-Q