Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2013	Jun. 15, 2013	Sep. 30, 2012
Document and Entity Information:
Entity Registrant Name	AdvanSource Biomaterials Corp
Document Type	10-K
Document Period End Date	Mar. 31, 2013
Amendment Flag	true
Amendment Description	Amendment No. 1
Entity Central Index Key	0001011060
Current Fiscal Year End Date	--03-31
Entity Common Stock, Shares Outstanding		21,490,621
Entity Public Float			$ 1,540,000
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY