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Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2016	Nov. 07, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Trading Symbol	hsm
Entity Registrant Name	HELIUS MEDICAL TECHNOLOGIES, INC.
Entity Central Index Key	0001610853
Current Fiscal Year End Date	--03-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		84,534,684
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well Known Seasoned Issuer	No
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2

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