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Significant Accounting Policies - Schedule of Useful Lives of Property, Plant and Equipment (Details)
 12 Months Ended
Mar. 31, 2018
Computer Equipment  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 2-3 years
Office/Lab Equipment  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 3-5 years
Furniture and Fixtures  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 3-10 years
Warehouse Equipment  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 5-15 years
Production Equipment  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 3-30 years
Leasehold Improvements  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 3-20 years
Building and Improvements  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 20-40 years
Greenhouse and Improvements  
Disclosure Of Property Plant And Equipment [Line Items]  
Useful life 20-25 years