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Note 10 - Pension and Other Postretirement Benefits (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Benefits Accrued $ 0    
Defined Contribution Plan, Cost Recognized 0 0 0
Defined Contribution Plan, Employers Contribution Vesting Period 5 years    
Equities [Member] | U.S. Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 50.00%    
Equities [Member] | U.S. Plan [Member] | Minimum [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 30.00%    
Equities [Member] | U.S. Plan [Member] | Maximum [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 70.00%    
Equities [Member] | Canadian Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 50.00%    
Debt Securities [Member] | U.S. Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 50.00%    
Debt Securities [Member] | U.S. Plan [Member] | Minimum [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 30.00%    
Debt Securities [Member] | U.S. Plan [Member] | Maximum [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 70.00%    
Debt Securities [Member] | Canadian Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 50.00%    
U.S. Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 20.00%    
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 200,000    
Defined Benefit Plan, Future Amortization of Gain (Loss) (46,000)    
Defined Benefit Plan, Accumulated Benefit Obligation 3,262,296 4,100,047  
Canadian Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 65,000    
Defined Benefit Plan, Future Amortization of Gain (Loss) 33,000    
Defined Benefit Plan, Accumulated Benefit Obligation 1,366,076 1,500,537  
401 k [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 10.00%    
Defined Contribution Plan, Cost Recognized 12,000 12,000 4,000
Defined Contribution Plan, Employer Discretionary Contribution Amount 0.10    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount 1.00    
Defined Contribution Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 3.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 5.00%    
Defined Contribution Plan, Cost Recognized 4,600 4,600 4,000
Defined Contribution Plan, Employer Contribution, Percentage Of Employee Elective Contribution 50.00%    
Canadian Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 3.00%    
Defined Contribution Plan Employee Elective Employer Contribution Percent 50.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 5.00%    
Death Benefit Plan [Member]
      
Note 10 - Pension and Other Postretirement Benefits (Details) [Line Items]      
Pension and Other Postretirement Defined Benefit Plans, Liabilities $ 62,000 $ 62,000