Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Summary of Significant Accounting Policies

Schedule of supplemental cash flow information (in thousands)

	Years Ended December 31,
	2024		2023		2022
Cash paid during the year for:
Interest	$	169	$	196	$	113
Income taxes	$	30,405	$	17,994	$	7,827

Schedule of additions and write-offs to the Company's allowance for doubtful accounts (in thousands)

	2024		2023
Beginning balance	$	575	$	550
Additions		110		49
Adjustments for expected credit loss factors		—		—
Write-offs		(84)		(24)
Ending balance	$	601	$	575

Schedule of inventories

	December 31,		December 31,
	2024		2023
Lime and limestone inventories:
Raw materials	$	8,947	$	7,834
Finished goods		3,000		3,107
		11,947		10,941
Parts inventories		15,739		13,372
	$	27,686	$	24,313

Schedule of estimated useful lives of property, plant and equipment (in thousands)

Buildings and building and leasehold improvements	3	-	25	years
Machinery and equipment	2	-	30	years
Furniture and fixtures	3	-	10	years
Automotive equipment	3	-	10	years

Schedule of accrued expenses (in thousands)

	December 31,
	2024		2023
Personnel related expenses	$	3,371	$	4,073
Income taxes		466		2,010
Other taxes		1,098		1,112
Utilities		893		944
Other		713		366
	$	6,541	$	8,505

Schedule of computation of basic and diluted income per common share

	Years Ended December 31,
	2024		2023		2022
Net income for basic and diluted income per common share	$	108,839	$	74,549	$	45,429
Weighted-average shares for basic income per common share		28,579,354		28,461,955		28,359,800
Effect of dilutive securities:
Employee and director stock options(1)		109,017		71,425		42,245
Adjusted weighted-average shares and assumed exercises for diluted income per common share		28,688,371		28,533,380		28,402,045
Basic net income per common share	$	3.81	$	2.62	$	1.60
Diluted net income per common share	$	3.79	$	2.61	$	1.60

(1) Excludes 9,375 and 80,625 stock options in 2023 and 2022, respectively, as antidilutive because the exercise price exceeded the average per share market price for the periods presented. No stock options were excluded in 2024 as antidilutive.