Loss Contingency, Allegations Number of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance State {1} State State Outstanding checks Represents the monetary amount of Outstanding checks, as of the indicated date. Land Improvements {1} Land Improvements Vehicles Furniture and Fixtures Long-Lived Asset, Class [Axis] Percentage of total value invoiced to customer Represents the percentage value of Percentage of total value invoiced to customer, as of the indicated date. Use of Estimates: Nature of Operations: Billings in excess of costs and estimated earnings Changes in other assets and liabilities Operating activities Total current assets Total current assets Details {1} Details Consolidated Balance Sheets - Parenthetical Auditor Firm ID Amendment Flag Entity Voluntary Filers Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Tax inventory adjustment Represents the monetary amount of Tax inventory adjustment, as of the indicated date. Income Tax Jurisdiction Aerospace / Defense Represents the Aerospace / Defense, during the indicated time period. Long-Term Line of Credit Costs incurred on uncompleted contracts, Estimated earnings Represents the monetary amount of Costs incurred on uncompleted contracts, Estimated earnings, during the indicated time period. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable Sales Taxes: Property and Equipment: 3. Inventory: 1. Summary of Significant Accounting Policies: Provision for inventory obsolescence Provision for inventory obsolescence Amortization {1} Amortization Common Stock Diluted earnings per common share (Note 11) Gross profit Gross profit Cost of goods sold Sales, net (Note 9) Common Stock, Shares, Issued Common Stock, Par or Stated Value Per Share Auditor Name Entity Shell Company Entity Address, City or Town $11.01-$12.00 Represents the $11.01-$12.00, during the indicated time period. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Beginning Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Beginning Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance Average common shares outstanding assuming dilution Average common shares outstanding assuming dilution Represents the Average common shares outstanding assuming dilution (number of shares), during the indicated time period. New York Represents the New York, during the indicated time period. Other permanent differences Provision for potential inventory obsolescence Represents the monetary amount of Provision for potential inventory obsolescence, during the indicated time period. Less allowance for obsolescence Accounts Receivable, before Allowance for Credit Loss, Current 13. Stock Option Plans: 5. Maintenance and Other Inventory: 2. Accounts Receivable: Net operating activities Net operating activities Stock options issued for services {1} Stock options issued for services Research and development costs Details {2} Details Patents, net Inventory (Note 3) Local Phone Number Entity Address, Address Description Document Transition Report Class of Stock Pension and Other Postretirement Benefits Cost (Reversal of Cost) $16.01-$17.00 Represents the $16.01-$17.00, during the indicated time period. $ 9.01-$57.00 Represents the $ 9.01-$57.00, during the indicated time period. Risk-free interest rate Income Tax Jurisdiction [Axis] Other Adjustments Represents the monetary amount of Other Adjustments, during the indicated time period. Segments [Axis] Machinery and Equipment Schedule of Amounts are included in the accompanying balance sheets Represents the textual narrative disclosure of Schedule of Amounts are included in the accompanying balance sheets, during the indicated time period. Stock-Based Compensation: Subsequent Events: 11. Earnings Per Common Share: Accrued expenses Credit loss expense (recovery) Credit loss expense (recovery) Cash value of life insurance, net Property and equipment, net (Note 6) Property and equipment, net (Note 6) Assets {1} Assets Entity Common Stock, Shares Outstanding Entity Public Float Phone Fax Number Description Weighted Average Remaining Years of Contractual Life $30.01-$31.00 Represents the $30.01-$31.00, during the indicated time period. Exercise Price Range Stock options issued for services {2} Stock options issued for services Represents the monetary amount of Stock options issued for services, as of the indicated date. Foreign-derived intangible income deduction Foreign-derived intangible income deduction Other Represents the Other, during the indicated time period. Building Improvements Aggregate amount remaining Represents the monetary amount of Aggregate amount remaining, as of the indicated date. New Accounting Standards: Revenue Recognition: Cash and cash equivalents - beginning Cash and cash equivalents - beginning Cash and cash equivalents - ending Income before provision for income taxes Income before provision for income taxes Liabilities and Equity Liabilities and Equity Entity Small Business Security Exchange Name Statement $ 9.01-$47.00 Represents the $ 9.01-$47.00, during the indicated time period. $20.01-$21.00 Represents the $20.01-$21.00, during the indicated time period. Common shares issued to employees Represents the Common shares issued to employees (number of shares), during the indicated time period. Maintenance and other inventory, allowance for obsolescence Represents the monetary amount of Maintenance and other inventory, allowance for obsolescence, as of the indicated date. Less allowance for estimated credit losses 16. Legal Proceedings: 8. Accrued Expenses: Prepaid income taxes {1} Prepaid income taxes Prepaid expenses {1} Prepaid expenses Selling, general and administrative expenses Stockholders' equity Accrued income taxes Liabilities and Stockholders' Equity Cash and cash equivalents Document Fiscal Year Focus Document Type $46.01-$47.00 Represents the $46.01-$47.00, during the indicated time period. Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Expected life in years Excess tax depreciation Excess tax depreciation Represents the monetary amount of Excess tax depreciation, as of the indicated date. Deferred Tax Assets, Gross Deferred Tax Assets, Gross Allowance for obsolete inventory Represents the monetary amount of Allowance for obsolete inventory, as of the indicated date. Income Tax Jurisdiction, Domestic State and Local Segments Less accumulated depreciation Inventory disposed of Represents the monetary amount of Inventory disposed of, during the indicated time period. Finished goods Represents the Finished goods, during the indicated time period. Schedule of Stock Options Activity Schedule of Earnings Per Common Share Cash Value of Life Insurance: Financing activities Net investing activities Net investing activities Issuance of shares for employee stock option plan Net income Net income Provision for income taxes (Note 10) Provision for income taxes (Note 10) Common Stock, Shares Authorized Current assets Auditor Location Entity Emerging Growth Company City Area Code Entity Registrant Name Class of Stock [Axis] Loss Contingency, Inestimable Loss Represents the description of Loss Contingency, Inestimable Loss, during the indicated time period. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Expected dividend yield Stock option costs Represents the monetary amount of Stock option costs, during the indicated time period. Research tax credits Research tax credits Current Federal, State and Local, Tax Expense (Benefit) Current Federal, State and Local, Tax Expense (Benefit) Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Inventory {1} Inventory Disaggregation of Sales Revenue Schedule of Accrued Expenses Shipping and Handling Costs: Net change in cash and cash equivalents Net change in cash and cash equivalents Proceeds from issuance of common stock Accrued income taxes {1} Accrued income taxes Accounts payable {1} Accounts payable Retained earnings Billings in excess of costs and estimated earnings (Note 4) Prepaid expenses Trading Symbol Loss Contingency, Lawsuit Filing Date $10.01-$11.00 Represents the $10.01-$11.00, during the indicated time period. Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Industrial Represents the Industrial, during the indicated time period. Land {1} Land Costs incurred on uncompleted contracts, Billings to date Represents the monetary amount of Costs incurred on uncompleted contracts, Billings to date, during the indicated time period. Schedule of Components of Income Tax Expense (Benefit) Income Taxes: 7. Short-Term Borrowings: Details {4} Details Other income Current liabilities Maintenance and other inventory, net (Note 5) Document Fiscal Period Focus Title of 12(b) Security Statement [Line Items] Average common shares outstanding Represents the Average common shares outstanding (number of shares), during the indicated time period. Accrued vacation Represents the monetary amount of Accrued vacation, as of the indicated date. Deferred tax assets Income Tax Jurisdiction, Domestic Federal Deferred Federal, State and Local, Tax Expense (Benefit) Deferred Federal, State and Local, Tax Expense (Benefit) Federal Structural Represents the Structural, during the indicated time period. Maintenance and other inventory, Gross Represents the monetary amount of Maintenance and other inventory, Gross, as of the indicated date. Aggregate percent complete Represents the percentage value of Aggregate percent complete, as of the indicated date. Costs incurred on uncompleted contracts, Net Costs incurred on uncompleted contracts, Net Represents the monetary amount of Costs incurred on uncompleted contracts, Net, during the indicated time period. Inventory, Gross Raw Materials Schedule of Fair Value Assumptions 15. Fair Value of Financial Instruments: 14. Retirement Plan: 9. Sales: Net financing activities Net financing activities Acquisition of treasury stock Acquisition of treasury stock Treasury stock - 1,070,762 and 1,051,688 shares at cost Treasury stock - 1,070,762 and 1,051,688 shares at cost Entity Address, Address Line One Commitments to make capital expenditures Depreciation, Depletion and Amortization Billings in excess of costs and estimated earnings {1} Billings in excess of costs and estimated earnings Represents the monetary amount of Billings in excess of costs and estimated earnings, during the indicated time period. Work-in-process Represents the Work-in-process, during the indicated time period. Schedule of Property, Plant and Equipment Tables/Schedules Principles of Consolidation: Inventory Inventory Issuance of shares for employee stock purchase plan Equity Components [Axis] Accounts payable ICFR Auditor Attestation Flag Entity Tax Identification Number Document Annual Report Series A Preferred Stock Common Class A Loss Contingency, Parties Jointly and Severally Liable in Litigation Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Accrued professional fees Represents the monetary amount of Accrued professional fees, as of the indicated date. Effective income tax rate Computed tax provision at the expected statutory rate Federal {1} Federal Deferred tax provision (benefit) Customer deposits Represents the Customer deposits, during the indicated time period. Line of Credit Facility, Average Outstanding Amount Schedule of Maintenance and Other Inventory Represents the textual narrative disclosure of Schedule of Maintenance and Other Inventory, during the indicated time period. Accounts and Other Receivables Short-Term Investments: Cash and Cash Equivalents: 6. Property and Equipment: Other assets {1} Other assets Costs and estimated earnings in excess of billings Deferred income taxes Stock options issued for services Equity Component Total other income, net Total other income, net Miscellaneous Common Stock, Shares, Outstanding Total stockholders' equity Total stockholders' equity Equity, Attributable to Parent, Beginning Balance Equity, Attributable to Parent, Ending Balance Other assets Prepaid income taxes Accounts receivable, net (Note 2) Accounts receivable, net (Note 2) Document Financial Statement Error Correction Fiscal Year End Registrant CIK $12.01-$13.00 Represents the $12.01-$13.00, during the indicated time period. Expected volatility Net deferred tax assets Net deferred tax assets R&D capitalization Represents the monetary amount of R&D capitalization, as of the indicated date. Costs and estimated earnings in excess of billings {1} Costs and estimated earnings in excess of billings Represents the monetary amount of Costs and estimated earnings in excess of billings, during the indicated time period. Schdule of Status of Projects in progress Represents the textual narrative disclosure of Schdule of Status of Projects in progress, during the indicated time period. Schedule of Costs incurred on uncompleted contracts and Estimated earnings Schedule of Inventory Inventory: Accounts Receivable: 12. Employee Stock Purchase Plan: Notes Investing activities Accounts receivable, net Accounts receivable, net Treasury Stock, Common, Shares Entity Interactive Data Current Entity Address, Postal Zip Code $19.01-$20.00 Represents the $19.01-$20.00, during the indicated time period. Exercise Price Range [Axis] Common shares issuable under stock option plans Represents the Common shares issuable under stock option plans (number of shares), during the indicated time period. Allowance for doubtful receivables Represents the monetary amount of Allowance for doubtful receivables, as of the indicated date. Costs incurred on uncompleted contracts Represents the monetary amount of Costs incurred on uncompleted contracts, during the indicated time period. Schedule of Effective Income Tax Rate Reconciliation Policies Adjustments to reconcile net income to net cash flows from operating activities Details {3} Details Common Stock, Value Assets Assets Entity Filer Category Entity Current Reporting Status Weighted Average Exercise Price $43.01-$44.00 Represents the $43.01-$44.00, during the indicated time period. Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Income Tax Jurisdiction, Domestic Federal, State, and Local Liability Class [Axis] Long-Lived Asset, Class Maintenance and other inventory, Net Maintenance and other inventory, Net Represents the monetary amount of Maintenance and other inventory, Net, as of the indicated date. Revenues Recognized For amounts included in billings in excess of costs and estimated earnings Represents the monetary amount of Revenues Recognized For amounts included in billings in excess of costs and estimated earnings, during the indicated time period. 10. Income Taxes: Increase in cash value of life insurance Increase in cash value of life insurance Retained Earnings Interest, net Entity Well-known Seasoned Issuer Entity Address, State or Province Loss Contingency, Name of Plaintiff $56.01-$57.00 Represents the $56.01-$57.00, during the indicated time period. $ 9.01-$10.00 Represents the $ 9.01-$10.00, during the indicated time period. Deferred tax liabilities Warranty reserve Represents the monetary amount of Warranty reserve, as of the indicated date. Income Tax Paid, after Refund Received Current tax provision Schedule of Deferred Tax Assets and Liabilities Schedule of Income Taxes Paid 4. Costs and Estimated Earnings on Uncompleted Contracts: Increase in short-term investments Increase in short-term investments Additional Paid-in Capital Basic earnings per common share (Note 11) Paid-in capital Costs and estimated earnings in excess of billings (Note 4) Short-term investments Entity Incorporation, State or Country Code Document Period End Date Details $13.01-$14.00 Represents the $13.01-$14.00, during the indicated time period. Shares reserved for further issue Represents the Shares reserved for further issue (number of shares), as of the indicated date. California Represents the California, during the indicated time period. Tax effect of permanent differences Personnel costs Represents the Personnel costs, during the indicated time period. Fair Value by Liability Class Number of Projects in progress Represents the Number of Projects in progress, as of the indicated date. Costs incurred on uncompleted contracts, Gross Costs incurred on uncompleted contracts, Gross Represents the monetary amount of Costs incurred on uncompleted contracts, Gross, during the indicated time period. Inventory, Net Inventory, Net Inventory [Axis] Acquisition of property and equipment Acquisition of property and equipment Depreciation Treasury Stock, Common Operating income Operating income Total current liabilities Total current liabilities Accrued expenses (Note 8) Deferred income taxes (Note 10) Entity File Number