Note 13 - Commitments and Contingencies (Details Textual)
 1 Months Ended 3 Months Ended 12 Months Ended
Oct. 15, 2014
USD ($)
Nov. 06, 2013
USD ($)
Oct. 31, 2015
USD ($)
Nov. 30, 2014
USD ($)
Dec. 31, 2016
USD ($)
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
Oct. 15, 2014
CAD
Mar. 31, 2014
USD ($)
Mar. 31, 2013
USD ($)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability           $ (9,554,000) $ (2,058,000)      
Business Combination, Contingent Consideration, Liability           116,000 4,430,000        
Number of States Due Sales Tax                     1
Anthony Amato and Amega Scientific Corporation [Member]                      
Loss Contingency Expected Immeditate Accelaration of Stock Option Granted       $ 10,000              
Loss Contingency, Damages Sought, Value       10,000,000              
Payments for Legal Settlements     $ 3,165,000                
Litigation Settlement, Insurance Covered     415,000                
Loss Contingency Accrual     $ 1,041,000                
Anthony Amato and Amega Scientific Corporation [Member] | Improperly with holding Amount [Member]                      
Loss Contingency, Damages Sought, Value       704,065.86              
General and Administrative Expense [Member] | Other Accrued Expenses [Member]                      
Sales and Excise Tax Payable               $ 460,000   $ 1,408,000 $ 100,000
General and Administrative Expense [Member] | Anthony Amato and Amega Scientific Corporation [Member]                      
Gain (Loss) Related to Litigation Settlement             1,709,000        
Minimum [Member] | Anthony Amato and Amega Scientific Corporation [Member] | Lost Future Earnings and Punitive Damages [Member]                      
Loss Contingency, Damages Sought, Value       $ 500,000              
PCD [Member]                      
Business Combination, Payment of Contingent Consideration             $ 150,000        
Business Acquisition, Earn Out Period for Determination of Contingent Consideration 3 years                    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low | CAD                 CAD 0    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High $ 1,500,000                    
Business Combination, Contingent Consideration, Liability 300,000                    
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                    
Amega Scientific Corporation [Member]                      
Business Acquisition, Earn Out Period for Determination of Contingent Consideration   3 years                  
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low   $ 0                  
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   10,000,000                  
Business Combination, Contingent Consideration, Liability   $ 500,000                  
Business Acquisition, Agreement Holdback, Payment Period from Effective Date Less Any Losses Incurred by Buyer Payable To Seller   3 years                  
Amega Scientific Corporation [Member] | Minimum [Member]                      
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration   $ 31,625,000                  
Amega Scientific Corporation [Member] | Maximum [Member]                      
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration   $ 43,500,000