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Note 1 - Organization and Significant Accounting Policies (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Asset Recoverability Test, Amount (in Dollars)   $ 40,642,000  
Fair Value Inputs, Long-term Revenue Growth Rate   3.00%  
Goodwill, Impairment Loss (in Dollars) 6,900,000 6,900,000 0
Selling, General and Administrative Expense (in Dollars)   30,464,000 30,797,000
Preproduction Costs Related to Long-term Supply Arrangements, Costs Capitalized (in Dollars)   0 0
Income Tax Examination, Likelihood of Unfavorable Settlement   50%  
Revenue Recognition, Milestone Method, Revenue Recognized (in Dollars)   675,000  
Product Warranty Accrual (in Dollars)   1,439,000 1,111,000
Product Warranty Expense (in Dollars)   660,000 422,000
Extended Product Warranty Accrual, Warranties Issued (in Dollars)   1,567,000 2,607,000
Extended Product Warranty Accrual (in Dollars)   751,000 1,085,000
Other Liabilities (in Dollars)   816,000 1,522,000
Concentration Risk, Percentage   3.00%  
MultiEmployerPlansCollectiveBargainingArrangementNumberOfParticipants   500  
Multiemployer Plans, Collective-Bargaining Arrangement, Percentage of Participants   42.00%  
Multiemployer Plans Number Of Employees Under Collective Bargaining Arrangement Expiring With In Next Twelve Months   149  
Land, Buildings and Improvements [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives   40  
Machinery and Equipment [Member] | Minimum [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives   three  
Machinery and Equipment [Member] | Maximum [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives   fifteen  
Employee Benefit Related Adjustments, Mexico [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
MultiEmployerPlansCollectiveBargainingArrangementNumberOfParticipants   311  
Multiemployer Plans, Collective-Bargaining Arrangement, Percentage of Participants   26.00%  
Credit Concentration Risk [Member] | Customer Dana [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Entity Wide Accounts Receivable Due From Major Customer Percentage   47.00% 44.00%
Credit Concentration Risk [Member] | Customer Meritor [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Entity Wide Accounts Receivable Due From Major Customer Percentage   22.00% 21.00%
Credit Concentration Risk [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Entity Wide Accounts Receivable Due From Major Customer Percentage   69.00% 65.00%
Number Of Major Customers   2  
Write Off Of Deferred Cost Member
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Selling, General and Administrative Expense (in Dollars)     $ 1,709,000
Customer Dana [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage   58.00% 55.00%
Customer Meritor [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage   15.00% 15.00%
US Government [Member]
      
Note 1 - Organization and Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage     6.00%