Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]
Consolidation	Consolidation The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions have been eliminated in consolidation.
Receivables	Receivables Receivables consist primarily of trade receivables. The Company does not require collateral or other security and evaluates the collectability of its receivables based on a number of factors. An allowance for doubtful accounts is recorded for significant past due receivable balances based on a review of the past due items and the customer's ability and likelihood to pay, as well as applying a historical write-off ratio to the remaining balances.
Inventories	Inventories Inventories are valued at the lower of cost or market. Cost is determined using the first-in, first-out method. The Company estimates and records provisions for obsolete inventories.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost. Depreciation is provided over the estimated useful lives of the respective assets by the straight-line method. The estimated useful lives of assets are: for land improvements, 15 years; for buildings and improvements, 10 — 39 years; and for machinery and equipment, 3 — 20 years.
Long-Lived Assets	Long-Lived Assets Property, plant and equipment and identifiable intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If the sum of the expected undiscounted cash flows is less than the carrying value of the related asset or group of assets, a loss is recognized for the difference between the fair value and carrying value of the asset or group of assets. No adjustments were recorded as a result of these reviews during 2015, 2014 and 2013.
Intangible Assets	Intangible Assets Intangible assets are amortized on a straight-line basis over their estimated useful lives, ranging from 5 to 20 years. The Company does not have any intangible assets deemed to have indefinite lives.
Goodwill	Goodwill Goodwill is tested for impairment annually during the fourth fiscal quarter or more frequently if an event indicates that the goodwill might be impaired. Potential impairment is identified by comparing the fair value of a reporting unit with its carrying value. No adjustments were recorded to goodwill as a result of these reviews during 2015, 2014 and 2013.
Revenue Recognition	Revenue Recognition Revenues are generally recognized upon shipment of product, which corresponds with the transfer of title. The costs of shipping are generally billed to the customer upon shipment and are included in cost of sales. A small portion of the Company's sales includes shipments of products combined with services, such as meters sold with installation. The product and installation components of these multiple deliverable arrangements are considered separate units of accounting. The value of these separate units of accounting is determined based on their relative fair values determined on a stand-alone basis. Revenue is generally recognized when the last element of the multiple deliverable is delivered, which corresponds with installation and acceptance by the customer. The Company also sells a small number of extended support service agreements on certain products for the period subsequent to the normal support service provided with the original product sale. Revenue is recognized over the service agreement period, which is generally one year. In 2014, the company began offering software as a service with its BEACON AMA product. While the amounts were insignificant in 2014 and 2015, revenue for this service is recognized on a monthly basis as the service is performed.
Warranty and After-Sale Costs	Warranty and After-Sale Costs The Company estimates and records provisions for warranties and other after-sale costs in the period in which the sale is recorded, based on a lag factor and historical warranty claim experience. After-sale costs represent a variety of activities outside of the written warranty policy, such as investigation of unanticipated problems after the customer has installed the product, or analysis of water quality issues.
Research and Development	Research and Development Research and development costs are charged to expense as incurred
Stock-Based Compensation Plans	Stock-Based Compensation Plans As of December 31, 2015, the Company has an Omnibus Incentive Plan under which 700,000 shares are reserved for restricted stock and stock option grants for employees as well as stock grants for directors as described in Note 5 “Stock Compensation.” The plan was approved in 2011 and replaced all prior stock-based plans except for shares and options previously issued under those plans. The Company recognizes the cost of stock-based awards in net earnings for all of its stock-based compensation plans on a straight-line basis over the service period of the awards. The Company estimates the fair value of its option awards using the Black-Scholes option-pricing formula, and records compensation expense for stock options ratably over the stock option grant's vesting period. The Company values restricted stock and stock grants for directors on the closing price of the Company's stock on the day the grant was awarded.
Healthcare	Healthcare The Company estimates and records provisions for healthcare claims incurred but not reported, based on medical cost trend analysis, reviews of subsequent payments made and estimates of unbilled amounts.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Fair Value of Financial Instruments	Fair Value Measurements of Financial Instruments The carrying amounts of cash, receivables and payables in the financial statements approximate their fair values due to the short-term nature of these financial instruments. Short-term debt is comprised of notes payable drawn against the Company's lines of credit and commercial paper. Because of its short-term nature, the carrying amount of the short-term debt also approximates fair value. Included in other assets are insurance policies on various individuals who were associated with the Company. The carrying amounts of these insurance policies approximate their fair value.
Subsequent Events, Policy	Subsequent Events The Company evaluates subsequent events at the date of the balance sheet as well as conditions that arise after the balance sheet date but before the financial statements are issued. The effects of conditions that existed at the date of the balance sheet date are recognized in the financial statements. Events and conditions arising after the balance sheet date but before the financial statements are issued are evaluated to determine if disclosure is required to keep the financial statements from being misleading. To the extent such events and conditions exist, if any, disclosures are made regarding the nature of events and the estimated financial effects for those events and conditions. For purposes of preparing the accompanying consolidated financial statements and the notes to these financial statements, the Company evaluated subsequent events through the date the accompanying financial statements were issued.
New Pronouncement	New Pronouncements In November 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-17, Balance Sheet Classification of Deferred Taxes, requiring all deferred tax assets and liabilities, and any related valuation allowance, to be classified as non-current on the balance sheet. The classification change for all deferred taxes as non-current simplifies entities' processes as it eliminates the need to separately identify the net current and net non-current deferred tax asset or liability in each jurisdiction and allocate valuation allowances. The standard will be effective for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted for financial statements that have not been previously issued, and the ASU may be applied either prospectively to all deferred tax assets and liabilities or retrospectively to all periods presented. The guidance was adopted in the fourth quarter of 2015 on a prospective basis. The adoption did not have a material impact on the Company's financial condition or results of operations other than the presentation of deferred taxes on the Consolidated Balance Sheets. In May 2014, the FASB issued ASU No. 2014-09 “Revenue from Contracts with Customers.” ASU 2014-09 provides a single principles-based, five-step model to be applied to all contracts with customers. The five steps are to identify the contract(s) with the customer, to identify the performance obligations in the contract, to determine the transaction price, to allocate the transaction price to the performance obligations in the contract and to recognize revenue when each performance obligation is satisfied. Revenue will be recognized when promised goods or services are transferred to the customer in an amount that reflects the consideration expected in exchange for those goods or services. In April 2015, the FASB tentatively agreed to delay the effective date of ASU 2014-09 for one year and to permit early adoption by entities as of the original effective dates. In July 2015, the FASB affirmed its proposal to defer the effective date of the ASU, which has since been issued in August 2015. Considering the one year deferral, ASU 2014-09 will be effective for the Company beginning on January 1, 2018 and the standard allows for either full retrospective adoption or modified retrospective adoption. The Company is continuing to evaluate the impact that the adoption of this guidance will have on its financial condition, results of operations and the presentation of its financial statements.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2015

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions have been eliminated in consolidation.

Receivables

Receivables consist primarily of trade receivables. The Company does not require collateral or other security and evaluates the collectability of its receivables based on a number of factors. An allowance for doubtful accounts is recorded for significant past due receivable balances based on a review of the past due items and the customer's ability and likelihood to pay, as well as applying a historical write-off ratio to the remaining balances.

Inventories

Inventories are valued at the lower of cost or market. Cost is determined using the first-in, first-out method. The Company estimates and records provisions for obsolete inventories.

Property, Plant and Equipment

Property, plant and equipment are stated at cost. Depreciation is provided over the estimated useful lives of the respective assets by the straight-line method. The estimated useful lives of assets are: for land improvements, 15 years; for buildings and improvements, 10 — 39 years; and for machinery and equipment, 3 — 20 years.

Long-Lived Assets

Property, plant and equipment and identifiable intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If the sum of the expected undiscounted cash flows is less than the carrying value of the related asset or group of assets, a loss is recognized for the difference between the fair value and carrying value of the asset or group of assets. No adjustments were recorded as a result of these reviews during 2015, 2014 and 2013.

Intangible Assets

Intangible assets are amortized on a straight-line basis over their estimated useful lives, ranging from 5 to 20 years. The Company does not have any intangible assets deemed to have indefinite lives.

Goodwill

Goodwill is tested for impairment annually during the fourth fiscal quarter or more frequently if an event indicates that the goodwill might be impaired. Potential impairment is identified by comparing the fair value of a reporting unit with its carrying value. No adjustments were recorded to goodwill as a result of these reviews during 2015, 2014 and 2013.

Revenue Recognition

Revenues are generally recognized upon shipment of product, which corresponds with the transfer of title. The costs of shipping are generally billed to the customer upon shipment and are included in cost of sales. A small portion of the Company's sales includes shipments of products combined with services, such as meters sold with installation. The product and installation components of these multiple deliverable arrangements are considered separate units of accounting. The value of these separate units of accounting is determined based on their relative fair values determined on a stand-alone basis. Revenue is generally recognized when the last element of the multiple deliverable is delivered, which corresponds with installation and acceptance by the customer. The Company also sells a small number of extended support service agreements on certain products for the period subsequent to the normal support service provided with the original product sale. Revenue is recognized over the service agreement period, which is generally one year. In 2014, the company began offering software as a service with its BEACON AMA product. While the amounts were insignificant in 2014 and 2015, revenue for this service is recognized on a monthly basis as the service is performed.

Warranty and After-Sale Costs

The Company estimates and records provisions for warranties and other after-sale costs in the period in which the sale is recorded, based on a lag factor and historical warranty claim experience. After-sale costs represent a variety of activities outside of the written warranty policy, such as investigation of unanticipated problems after the customer has installed the product, or analysis of water quality issues.

Research and Development

Research and development costs are charged to expense as incurred

Stock-Based Compensation Plans

As of December 31, 2015, the Company has an Omnibus Incentive Plan under which 700,000 shares are reserved for restricted stock and stock option grants for employees as well as stock grants for directors as described in Note 5 “Stock Compensation.” The plan was approved in 2011 and replaced all prior stock-based plans except for shares and options previously issued under those plans.

The Company recognizes the cost of stock-based awards in net earnings for all of its stock-based compensation plans on a straight-line basis over the service period of the awards. The Company estimates the fair value of its option awards using the Black-Scholes option-pricing formula, and records compensation expense for stock options ratably over the stock option grant's vesting period. The Company values restricted stock and stock grants for directors on the closing price of the Company's stock on the day the grant was awarded.

Healthcare

The Company estimates and records provisions for healthcare claims incurred but not reported, based on medical cost trend analysis, reviews of subsequent payments made and estimates of unbilled amounts.

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Fair Value of Financial Instruments

Fair Value Measurements of Financial Instruments

The carrying amounts of cash, receivables and payables in the financial statements approximate their fair values due to the short-term nature of these financial instruments. Short-term debt is comprised of notes payable drawn against the Company's lines of credit and commercial paper. Because of its short-term nature, the carrying amount of the short-term debt also approximates fair value. Included in other assets are insurance policies on various individuals who were associated with the Company. The carrying amounts of these insurance policies approximate their fair value.

Subsequent Events, Policy

Subsequent Events

The Company evaluates subsequent events at the date of the balance sheet as well as conditions that arise after the balance sheet date but before the financial statements are issued. The effects of conditions that existed at the date of the balance sheet date are recognized in the financial statements. Events and conditions arising after the balance sheet date but before the financial statements are issued are evaluated to determine if disclosure is required to keep the financial statements from being misleading. To the extent such events and conditions exist, if any, disclosures are made regarding the nature of events and the estimated financial effects for those events and conditions. For purposes of preparing the accompanying consolidated financial statements and the notes to these financial statements, the Company evaluated subsequent events through the date the accompanying financial statements were issued.

New Pronouncement

New Pronouncements

In November 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-17, Balance Sheet Classification of Deferred Taxes, requiring all deferred tax assets and liabilities, and any related valuation allowance, to be classified as non-current on the balance sheet. The classification change for all deferred taxes as non-current simplifies entities' processes as it eliminates the need to separately identify the net current and net non-current deferred tax asset or liability in each jurisdiction and allocate valuation allowances. The standard will be effective for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted for financial statements that have not been previously issued, and the ASU may be applied either prospectively to all deferred tax assets and liabilities or retrospectively to all periods presented. The guidance was adopted in the fourth quarter of 2015 on a prospective basis. The adoption did not have a material impact on the Company's financial condition or results of operations other than the presentation of deferred taxes on the Consolidated Balance Sheets.

In May 2014, the FASB issued ASU No. 2014-09 “Revenue from Contracts with Customers.” ASU 2014-09 provides a single principles-based, five-step model to be applied to all contracts with customers. The five steps are to identify the contract(s) with the customer, to identify the performance obligations in the contract, to determine the transaction price, to allocate the transaction price to the performance obligations in the contract and to recognize revenue when each performance obligation is satisfied. Revenue will be recognized when promised goods or services are transferred to the customer in an amount that reflects the consideration expected in exchange for those goods or services.

In April 2015, the FASB tentatively agreed to delay the effective date of ASU 2014-09 for one year and to permit early adoption by entities as of the original effective dates. In July 2015, the FASB affirmed its proposal to defer the effective date of the ASU, which has since been issued in August 2015. Considering the one year deferral, ASU 2014-09 will be effective for the Company beginning on January 1, 2018 and the standard allows for either full retrospective adoption or modified retrospective adoption. The Company is continuing to evaluate the impact that the adoption of this guidance will have on its financial condition, results of operations and the presentation of its financial statements.