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Note 1 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Finite-Lived Intangible Asset Useful Lives [Table Text Block]
   
Years
 
Software    
3
 
Tradenames
   
5
 
Certification
   
5
 
Non-compete
   
5
 
Patents
   
9
 
Customer relationships
   
10