Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Summary of Significant Accounting Policies

Schedule of supplemental cash flow information (in thousands)

	Years Ended December 31,
	2016		2015		2014
Cash paid during the year for:
Interest	$	113	$	948	$	1,495
Income taxes	$	4,908	$	4,152	$	5,870

Schedule of the entity's financial liabilities measured at fair value on a recurring basis (in thousands)

	Fair Value Measurements as of December 31,
					Significant Other
					Observable Inputs
					(Level 2)
	December 31,		December 31,		December 31,		December 31,
	2016		2015		2016		2015		Valuation Technique
Foreign exchange hedges	$	(352)	$	—	$	(352)	$	—	Cash flows approach

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

	2016		2015
Beginning balance	$	400	$	350
Additions		293		63
Write-offs		(359)		(13)
Ending balance	$	334	$	400

Schedule of inventories, net

	December 31,		December 31,
	2016		2015
Lime and limestone inventories:
Raw materials	$	4,811	$	6,627
Finished goods		2,070		2,049
	$	6,881	$	8,676
Service parts inventories		5,552		6,052
	$	12,433	$	14,728

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

Buildings and building and leasehold improvements	3	-	20	years
Machinery and equipment	2	-	20	years
Furniture and fixtures	3	-	10	years
Automotive equipment	3	-	10	years

Schedule of other assets (in thousands)

	December 31,
	2016		2015
Deferred financing costs	$	49	$	63
Other		93		97
	$	142	$	160

Schedule of computation of basic and diluted income per common share

	Years Ended December 31,
	2016		2015		2014
Net income for basic and diluted income per common share	$	17,754	$	12,886	$	19,367
Weighted-average shares for basic income per common share		5,567,902		5,598,805		5,578,784
Effect of dilutive securities:
Employee and director stock options(1)		4,071		5,423		10,459
Adjusted weighted-average shares and assumed exercises for diluted income per common share		5,571,973		5,604,228		5,589,243
Basic net income per common share	$	3.19	$	2.30	$	3.47
Diluted net income per common share	$	3.19	$	2.30	$	3.47

(1) Excludes 22,425,  24,225 and 7,500 stock options in 2016, 2015 and 2014, respectively, as antidilutive because the exercise price exceeded the average per share market price for the periods presented.