Share-based Payment Arrangement [Abstract]
Stock-Based Compensation
Share-based Payment Arrangement [Text Block]
Payables and Accruals [Abstract]
Accrued Liabilities
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock
Common Stock [Member]
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Accumulated Deficit
Accumulated Deficit [Member]
-- None. No documentation exists for this element. --
Total accumulated other comprehensive loss
AOCI Attributable to Parent [Member]
Nil Coupon Perpetual Loan Notes
Nil Coupon Perpetual Loan Notes [Member]
-- None. No documentation exists for this element. --
Treasury Stock
Treasury Stock [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance (in shares)
Shares, Issued
Balance at beginning of period
Stockholders' Equity Attributable to Parent
Net loss
Net Income (Loss) Attributable to Parent
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Unrealized losses from marketable securities, net of tax
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax
Stock compensation expense
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
Common shares issued upon vesting of restricted stock units (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Gross
Common shares issued upon vesting of restricted stock units
Stock Issued During Period, Value, Restricted Stock Award, Gross
Treasury shares withheld (in shares)
Treasury Stock, Shares, Acquired
Treasury shares withheld
Treasury Stock, Value, Acquired, Cost Method
Adoption of ASC
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification
Balance (in shares)
Balance at end of period
Earnings Per Share [Abstract]
Basic weighted-average shares (in shares)
Weighted Average Number of Shares Outstanding, Basic
Conversion of unsecured loan notes (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities
Unexercised options and unvested RSUs (in shares)
Weighted Average Number of Shares, Restricted Stock
Diluted weighted-average shares (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Statement of Financial Position [Abstract]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
ASSETS
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Restricted cash
Restricted Cash and Cash Equivalents, Current
Accounts receivable, net of allowance for doubtful accounts of $1,216 and $1,411, respectively
Accounts Receivable, after Allowance for Credit Loss, Current
Inventories, net
Inventory, Net
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Income taxes receivable
Prepaid Taxes
Total current assets
Assets, Current
Property and equipment, net of accumulated depreciation of $26,481 and $26,528, respectively
Property, Plant and Equipment, Net
Goodwill
Goodwill
Other intangible assets, net of accumulated amortization of $6,601 and $6,608, respectively
Intangible Assets, Net (Excluding Goodwill)
Restricted cash
Restricted Cash and Cash Equivalents, Noncurrent
Right-of-use operating lease assets
Operating Lease, Right-of-Use Asset
Assets held for sale
Disposal Group, Including Discontinued Operation, Assets, Noncurrent
Other assets
Other Assets, Noncurrent
Total assets
Assets
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Accounts payable
Accounts Payable, Current
Accrued liabilities:
Accrued Liabilities, Current [Abstract]
Operating lease liabilities - current
Operating Lease, Liability, Current
Employee compensation
Employee-related Liabilities, Current
Other accrued liabilities
Other Accrued Liabilities, Current
Total current liabilities
Liabilities, Current
Operating lease liabilities - non-current
Operating Lease, Liability, Noncurrent
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Other liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
COMMITMENTS AND CONTINGENCIES (Note 14)
Commitments and Contingencies
Stockholders’ equity:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, $.01 par value, 40,000,000 shares authorized, 24,843,668 and 24,825,891 shares issued, and 24,186,824 and 24,170,585 shares outstanding, respectively
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital, Common Stock
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Nil coupon perpetual loan notes
Convertible Debt
Treasury stock, at cost
Treasury Stock, Value
Total stockholders’ equity
Total liabilities and stockholders’ equity
Liabilities and Equity
Accounting Policies [Abstract]
Schedule of Cash, Cash Equivalents, and Restricted Cash
Schedule of Cash and Cash Equivalents [Table Text Block]
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Leases [Abstract]
Leases
Lessee, Operating Leases [Text Block]
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations [Table]
Disposal Groups, Including Discontinued Operations [Table]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Scenario [Axis]
Scenario [Axis]
Scenario [Domain]
Scenario [Domain]
Scenario, Forecast
Forecast [Member]
Disposal Group Classification [Axis]
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
Disposal Group Classification [Domain]
Sold
Discontinued Operations, Disposed of by Sale [Member]
Held-for-sale
Discontinued Operations, Held-for-sale [Member]
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Group Name [Domain]
Disposal Group Name [Domain]
Fuel Conversion Segment
Fuel Conversion Segment [Member]
Fuel Conversion Segment [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Accrued Liabilities
Accrued Liabilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal consideration
Disposal Group, Including Discontinued Operation, Consideration
Commissions
Sales Commissions and Fees
Storage costs
Short-term Lease, Cost
Accrued severance charges
Supplemental Unemployment Benefits, Severance Benefits
Loss from discontinued operations
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent
Severance costs
Severance Costs
Restructuring and Related Activities [Abstract]
Restructuring Activities
Restructuring and Related Activities Disclosure [Text Block]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Award Type [Domain]
Stock Options
Share-based Payment Arrangement, Option [Member]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Incentive Plan
2014 Long-Term Incentive Plan [Member]
2014 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Expired or forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period
Outstanding, end of period (in shares)
Number of Shares, exercisable (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Weighted- Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning of period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Granted (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Exercised (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Expired or forfeited (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Outstanding, end of period (in dollars per share)
Weighted average exercise price, exercisable (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Weighted- Average Remaining Contractual Term, Outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted- Average Remaining Contractual Term, Exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value, Outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Aggregate Intrinsic Value, Exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Unrecognized compensation costs
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
CHINA
CHINA
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
Employee Severance
Employee Severance [Member]
Facility Closing
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Total Revenues
Revenue from Contract with Customer, Excluding Assessed Tax
Total assets
Liabilities
Net Assets
Net Assets
Restructuring, expected cost
Restructuring and Related Cost, Expected Cost
Payments for restructuring
Payments for Restructuring
Restructuring charge
Restructuring Charges
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss, Current
Accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Common stock, shares issued (in shares)
Common Stock, Shares, Issued
Common stock outstanding (in shares)
Common Stock, Shares, Outstanding
Revenue from Contract with Customer [Abstract]
Trade receivable
Accounts Receivable, before Allowance for Credit Loss, Current
Unbilled receivable
Unbilled Receivables, Current
Insurance proceeds receivable (Note 14)
Insurance Settlements Receivable
Other short-term receivable
Accounts and Other Receivables, Net, Current
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss
Total accounts receivable
Cash paid for amounts included in the measurement of lease liabilities
Operating Lease, Payments
Leased assets obtained in exchange for new operating lease liabilities
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Commitments and Contingencies Disclosure [Abstract]
Contingencies
Commitments and Contingencies Disclosure [Text Block]
Earnings per Share
Earnings Per Share [Text Block]
Restrictions on Cash and Cash Equivalents [Table]
Restrictions on Cash and Cash Equivalents [Table]
Restricted Cash and Cash Equivalents [Axis]
Restricted Cash and Cash Equivalents [Axis]
Cash and Cash Equivalents [Domain]
Cash and Cash Equivalents [Domain]
Restricted Until Maturity Date
Restricted Until Maturity Date [Member]
Restricted Until Maturity Date [Member]
Restricted Until Expiration of Agreement December 2020
Restricted Until Expiration of Agreement December 2020 [Member]
Restricted Until Expiration of Agreement December 2020 [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents Items [Line Items]
Balance of total restricted cash
Restricted Cash and Cash Equivalents
Restricted cash included in current assets
Restricted cash included in long-term assets
Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Revenue Disaggregated by Geography
Revenue from External Customers by Geographic Areas [Table Text Block]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
Discontinued Operations
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Contract liabilities (Note 3)
Contract with Customer, Liability, Current
Accrued remediation contingency (Note 14)
Accrued Environmental Loss Contingencies, Current
Other accrued liabilities
Other Accrued Liabilities, Miscellaneous, Current
Other Accrued Liabilities, Miscellaneous, Current
Total other accrued liabilities
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Air Pollution Control
Air Pollution Control Segment [Member]
-- None. No documentation exists for this element. --
FUEL CHEM
Fuel Chem Segment [Member]
-- None. No documentation exists for this element. --
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Technology solutions
Technology Solutions [Member]
Technology Solutions [Member]
Spare parts
Spare Parts [Member]
Spare Parts [Member]
Ancillary revenue
Ancillary Revenue [Member]
Ancillary Revenue [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Equity [Abstract]
Treasury stock (in shares)
Treasury Stock, Shares
Cost of common stock held in treasury
Debt Disclosure [Abstract]
Debt Financing
Debt Disclosure [Text Block]
Restructuring Reserve [Roll Forward]
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance
Restructuring Reserve
Amounts expensed
Amounts paid
Restructuring liability, ending balance
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Domain]
Timing of Transfer of Good or Service [Domain]
Products transferred at a point in time
Transferred at Point in Time [Member]
Products and services transferred over time
Transferred over Time [Member]
General
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Document and Entity Information [Abstract]
-- None. No documentation exists for this element. --
Entity Registrant Name
Entity Registrant Name
Document Type
Document Type
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Amendment Flag
Amendment Flag
Entity Central Index Key
Entity Central Index Key
Entity Filer Category
Entity Filer Category
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Small Business
Entity Small Business
Entity Shell Company
Entity Shell Company
Entity Current Reporting Status
Entity Current Reporting Status
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus (Q1,Q2,Q3,FY)
Document Fiscal Period Focus
Income Statement [Abstract]
Income tax benefit
Discontinued Operation, Tax Effect of Discontinued Operation
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles
Goodwill and Intangible Assets Disclosure [Text Block]
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Total other comprehensive income
Other Comprehensive Income (Loss), Net of Tax
Comprehensive income (loss)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Air Pollution Control Segment
FUEL CHEM Segment
Goodwill [Line Items]
Goodwill [Line Items]
Number of reporting units
Number of Reporting Units
Goodwill impairments
Goodwill, Impairment Loss
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Other
Other Segments [Member]
-- None. No documentation exists for this element. --
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Revenues from external customers
Cost of sales
Cost of Revenue
Gross margin
Gross Profit
Selling, general and administrative
Selling, General and Administrative Expense
Restructuring charge
Research and development
Research and Development Expense
Asset Impairment Charges
Asset Impairment Charges
Operating loss from continuing operations
Operating Income (Loss)
United States
UNITED STATES
South America
South America [Member]
Europe
Europe [Member]
Asia
Asia [Member]
Total Foreign Revenues
Non-US [Member]
Business Segment and Geographic Financial Data
Segment Reporting Disclosure [Text Block]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Foreign currency translation
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Available-for-sale marketable securities
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Increase (Decrease) in Accumulated Other Comprehensive Loss [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total other comprehensive (loss) income
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Other comprehensive (loss) income
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent
Income Tax Disclosure [Abstract]
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Federal tax rate (as a percent)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Unrecognized tax benefits
Unrecognized Tax Benefits
Revenues
Costs and expenses:
Costs and Expenses [Abstract]
Cost of sales
Selling, general and administrative
Research and development
Asset Impairment Charges
Costs and expenses:
Costs and Expenses
Interest expense
Interest Expense
Interest income
Investment Income, Interest
Other expense
Other Nonoperating Income (Expense)
Loss from continuing operations before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income tax expense
Income Tax Expense (Benefit)
Net loss from continuing operations
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
Loss from discontinued operations (net of income tax benefit of $0 in 2019 and 2018)
Net loss
Net loss per common share:
Earnings Per Share, Basic and Diluted [Abstract]
Basic
Earnings Per Share, Basic [Abstract]
Continuing operations (in dollars per share)
Income (Loss) from Continuing Operations, Per Basic Share
Discontinued operations (in dollars per share)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share
Basic net loss per common share (in dollars per share)
Earnings Per Share, Basic
Diluted
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)
Income (Loss) from Continuing Operations, Per Diluted Share
Discontinued operations (in dollars per share)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share
Diluted net loss per common share (in dollars per share)
Earnings Per Share, Diluted
Weighted-average number of common shares outstanding:
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Basic (in shares)
Diluted (in shares)
New Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Revenue Recognition
Revenue from Contract with Customer [Policy Text Block]
Restricted Stock
Restricted Stock [Member]
Shares (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Ending balance (in shares)
Weighted Average Grant Date Fair Value (in Dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Granted (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Forfeited (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Vested (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Ending balance (in dollars per share)
Schedule of other accrued liabilities
Other Current Liabilities [Table Text Block]
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2016-02
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liabilities
Liabilities [Abstract]
Equity
Income Taxes
Income Tax Disclosure [Text Block]
Restructuring
Restructuring and Related Costs [Table Text Block]
Reconciliation of restructuring accrual
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Total operating lease liabilities
Operating Lease, Liability
Treasury Stock
Treasury Stock [Text Block]
Foreign
Foreign [Member]
-- None. No documentation exists for this element. --
Revenues:
Revenues [Abstract]
Stock options and restricted stock units, net of forfeited
Share-based Payment Arrangement, Expense
Tax benefit of stock-based compensation expense
Excess Tax Benefit from Share-based Compensation, Operating Activities
After-tax effect of stock-based compensation
Share-based Payment Arrangement, Expense, after Tax
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Table]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Lease, Description [Line Items]
Number of lease arrangements
Number Of Lease Arrangements
Number Of Lease Arrangements
Term of lease
Lessee, Operating Lease, Term of Contract
Operating lease cost
Operating Lease, Cost
Short-term lease cost
Total lease cost
Lease, Cost
Weighted average remaining lease term
Operating Lease, Weighted Average Remaining Lease Term
Weighted average discount rate
Operating Lease, Weighted Average Discount Rate, Percent
Schedule of Cumulative Effect of Changes to Balance Sheet
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Schedule of Lease Costs
Lease, Cost [Table Text Block]
Lessee, Operating Lease, Liability, Maturity
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Assets And Liabilities, Lessee
Assets And Liabilities, Lessee [Table Text Block]
Assets And Liabilities, Lessee [Table Text Block]
2019 Executive Performance RSU Award Agreement
2019 Executive Performance RSU Award Agreement [Member]
2019 Executive Performance RSU Award Agreement [Member]
Deferred Plan
Deferred Compensation Plans For Directors [Member]
Deferred Compensation Plans For Directors [Member]
Award Date [Axis]
Award Date [Axis]
Award Date [Domain]
Award Date [Domain]
Second Anniversary of Award Date
Second Anniversary Of Award Date [Member]
-- None. No documentation exists for this element. --
Third Anniversary of Award Date
Third Anniversary Of Award Date [Member]
-- None. No documentation exists for this element. --
Fourth Anniversary of Award Date
Fourth Anniversary Of Award Date [Member]
-- None. No documentation exists for this element. --
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain]
Deferred Compensation
Deferred Compensation, Share-based Payments [Member]
Number of shares originally reserved (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Number of shares available for grant (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Required operating income
Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Threshold, Operating Income
Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Threshold, Operating Income
Period before vesting begins
Share-Based Compensation Arrangement By Share-Based Payment Award, Period Before Vesting Begins
Share-Based Compensation Arrangement By Share-Based Payment Award, Period Before Vesting Begins
Percent of options vesting
PercentOfOptionsVesting
Stock options granted to employees under the Incentive Plan have a 10-year life and they vest as follows: 50% after the second anniversary of the award date, 25% after the third anniversary, and the final 25% after the fourth anniversary of the award date.
Award service period (in years)
Stock-based Compensation Arrangement by Share-based Payment Award, Award Service Period
Stock-based Compensation Arrangement by Share-based Payment Award, Award Service Period
Unrecognized compensation cost
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Unrecognized compensation cost, period of recognition (in years)
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Fair value of stock vested
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Stock-based compensation expense
Line of Credit Facility [Table]
Line of Credit Facility [Table]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Cash Collateral Security Agreement [Member]
Cash Collateral Security Agreement [Member]
Cash Collateral Security Agreement [Member]
U.S. Domestic Credit Facility
U.S. Domestic Credit Facility [Member]
U.S. Domestic Credit Facility [Member]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Revolving Credit Facility
Revolving Credit Facility [Member]
Domestic Line of Credit
Domestic Line of Credit [Member]
Standby Letters of Credit
Standby Letters of Credit [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility [Line Items]
Cash collateral, percentage of face amount of outstanding standby letters of credit
Debt Instrument, Cash Collateral, Percentage Of Face Amount Of Outstanding Debt
Debt Instrument, Cash Collateral, Percentage Of Face Amount Of Outstanding Debt
Basis spread on variable rate (as percent)
Debt Instrument, Basis Spread on Variable Rate
Letters of credit, amount outstanding
Letters of Credit Outstanding, Amount
Restricted cash
Restricted Cash
Line of credit, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Line of credit, remaining borrowing capacity
Line of Credit Facility, Remaining Borrowing Capacity
Loss Contingencies [Table]
Loss Contingencies [Table]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
Customer One
Customer One [Member]
Customer One [Member]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Expected insurance proceeds
Expected Insurance Proceeds
Expected Insurance Proceeds
Insurance deductible
Insurance Deductible
Insurance Deductible
Addition to claims receivable
Insurance Settlements Receivable, Current
Addition to accrued liability
Accrued Environmental Loss Contingencies, Increase (Decrease)
Accrued Environmental Loss Contingencies, Increase (Decrease)
Receivable from insurance carrier
Non-conformance accrual
Loss Contingency Accrual
Accounts receivable
Change in warranty liability balance
Standard Product Warranty Accrual, Period Increase (Decrease)
Warranty liability balance
Standard Product Warranty Accrual
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Number of reportable segments
Number of Reportable Segments
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
2019 (excluding the six months ended June 30, 2019)
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year
2020
Lessee, Operating Lease, Liability, Payments, Due Year Two
2021
Lessee, Operating Lease, Liability, Payments, Due Year Three
2022
Lessee, Operating Lease, Liability, Payments, Due Year Four
2023
Lessee, Operating Lease, Liability, Payments, Due Year Five
Thereafter
Lessee, Operating Lease, Liability, Payments, Due after Year Five
Total lease payments
Lessee, Operating Lease, Liability, Payments, Due
Less imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Total
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Schedule of Stock Option Activity
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Schedule of Nonvested Restricted Stock Units Activity
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Unbilled receivables, current
Billings in excess of cost, current
Billings in Excess of Cost, Current
Revenue recognized, included in contract liability balance
Contract with Customer, Liability, Revenue Recognized
Number of contracts identified as loss contracts
Contract With Customer, Contracts In Progress, Number Of Contracts Identified As Loss Contracts
Contract With Customer, Contracts In Progress, Number Of Contracts Identified As Loss Contracts
Provision for losses on contracts
Provision for Loss on Contracts
Remaining performance obligations
Revenue, Remaining Performance Obligation, Amount
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue
Revenue from Contract with Customer [Text Block]
Antidilutive securities excluded from computation of earnings per share (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Assets
Long-Lived Assets
Statement of Cash Flows [Abstract]
Operating Activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Loss from discontinued operations
Adjustments to reconcile net loss to net cash used in operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation
Depreciation
Amortization
Amortization
Loss on disposal of equipment
Gain (Loss) on Disposition of Property Plant Equipment
Provision for doubtful accounts, net of recoveries
Accounts Receivable, Credit Loss Expense (Reversal)
Stock-based compensation, net of forfeitures
Share-based Payment Arrangement, Noncash Expense
Changes in operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Inventories
Increase (Decrease) in Inventories
Prepaid expenses, other current assets and other non-current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Accounts payable
Increase (Decrease) in Accounts Payable
Accrued liabilities and other non-current liabilities
Increase (Decrease) in Accrued Liabilities
Net cash used in operating activities - continuing operations
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
Net cash used in operating activities - discontinued operations
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Net cash used in operating activities
Net Cash Provided by (Used in) Operating Activities
Investing Activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of equipment and patents
Payments to Acquire Productive Assets
Proceeds from the sale of equipment
Proceeds from Sale of Machinery and Equipment
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Financing Activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Taxes paid on behalf of equity award participants
Payments for Repurchase of Equity
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
Effect of exchange rate fluctuations on cash
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Net decrease in cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Cash, cash equivalents, and restricted cash at beginning of period (Note 2)
Cash, cash equivalents and restricted cash at end of period (Note 2)