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Note 3 - Acquisitions (Details)
3 Months Ended 6 Months Ended 12 Months Ended 84 Months Ended 90 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Note 3 - Acquisitions (Details) [Line Items]              
Number of Businesses Acquired           51 52
Business Combination, Acquisition Related Costs $ 134,000 $ 762,000 $ (248,000) $ 1,954,000      
Business Combination, Pro Forma Information, Adjustments to Interest and Other Expenses Related to Funding of Acquisition 12,000 562,000 82,000 236,000      
Business Combination, Pro Forma Information, Incremental Depreciation and Amoritzation 50,000 1,400,000 348,000 4,100,000      
Business Combination, Pro Forma Information, Adjustments to Selling, General and Administrative Expense 110,000 1,900,000 429,000 6,200,000      
2014 Acquisitions [Member]              
Note 3 - Acquisitions (Details) [Line Items]              
Business Combination, Consideration Transferred     194,773,000   $ 194,800,000    
Payments to Acquire Businesses, Gross         189,000,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents         1,100,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities         6,900,000    
Business Acquisition, Transaction Costs         $ 1,600,000    
Business Acquisition, Goodwill, Expected Tax Deductible Amount 116,500,000   116,500,000     $ 116,500,000 $ 116,500,000
Business Acquisition Purchase Price Allocation Intangible Assets Expected Tax Deductible Amount 36,700,000   36,700,000     36,700,000 36,700,000
2014 Acquisitions [Member] | Scenario, Adjustment [Member]              
Note 3 - Acquisitions (Details) [Line Items]              
Business Combination, Consideration Transferred     91,000        
2014 Acquisitions [Member] | Selling, General and Administrative Expenses [Member]              
Note 3 - Acquisitions (Details) [Line Items]              
Business Combination, Acquisition Related Costs   $ 186,000 0 $ 916,000      
2015 Acquisitions [Member]              
Note 3 - Acquisitions (Details) [Line Items]              
Business Combination, Consideration Transferred     11,145,000        
Payments to Acquire Businesses, Gross     11,800,000        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents 655,000   655,000     655,000 655,000
Business Acquisition, Transaction Costs 170,000   170,000     170,000 170,000
Business Combination, Acquisition Related Costs     35,000        
Business Acquisition, Goodwill, Expected Tax Deductible Amount 4,700,000   4,700,000     4,700,000 4,700,000
Business Acquisition Purchase Price Allocation Intangible Assets Expected Tax Deductible Amount 5,400,000   5,400,000     $ 5,400,000 $ 5,400,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual 2,900,000   3,400,000        
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual $ 559,000   $ 540,000