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Note 7 - Commitments and Contingencies (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2016
USD ($)
Jul. 31, 2016
CAD
Oct. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2016
CAD
Jul. 06, 2015
USD ($)
Jul. 06, 2015
CAD
Oct. 15, 2014
USD ($)
Business Combination, Contingent Consideration, Liability       $ 108,000   $ 108,000   $ 4,430,000        
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability           (5,076,000) $ (1,770,000)          
Anthony Amato and Amega Scientific Corporation [Member]                        
Payments for Legal Settlements     $ 3,165,000                  
Litigation Settlement, Insurance Covered     415,000                  
Loss Contingency Accrual     $ 1,041,000                  
General and Administrative Expense [Member] | Anthony Amato and Amega Scientific Corporation [Member]                        
Gain (Loss) Related to Litigation Settlement             $ 1,709,000          
Infitrak Acquisition [Member]                        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low       0   0     CAD 0   CAD 0  
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       6,682,000   6,682,000     CAD 9,000,000   CAD 15,000,000  
Business Combination, Contingent Consideration, Liability       4,436,000   $ 4,436,000       $ 9,271,000    
Business Combination, Payment of Contingent Consideration $ 4,594,000 CAD 6,000,000                    
Infitrak Acquisition [Member] | Contingent Consideration Year 1 [Member] | Minimum [Member]                        
Business Combination, Contingent Consideration, Sliding Scale of Growth                   30.00% 30.00%  
Infitrak Acquisition [Member] | Contingent Consideration Year 1 [Member] | Maximum [Member]                        
Business Combination, Contingent Consideration, Sliding Scale of Growth                   70.00% 70.00%  
Infitrak Acquisition [Member] | Contingent Consideration Year 2 [Member] | Minimum [Member]                        
Business Combination, Contingent Consideration, Sliding Scale of Growth                   15.00% 15.00%  
Infitrak Acquisition [Member] | Contingent Consideration Year 2 [Member] | Maximum [Member]                        
Business Combination, Contingent Consideration, Sliding Scale of Growth                   75.00% 75.00%  
PCD [Member]                        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low                       $ 0
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High                       1,500,000
Business Combination, Contingent Consideration, Liability                       300,000
Business Combination, Payment of Contingent Consideration               $ 150,000        
PCD [Member] | Other Expense, Net [Member]                        
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability       $ 450,000 $ 450,000              
PCD [Member] | Minimum [Member]                        
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration                       9,900,000
PCD [Member] | Maximum [Member]                        
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration                       $ 12,600,000