REVERSE STOCK SPLIT (Details Textual) (USD $)	12 Months Ended
REVERSE STOCK SPLIT (Details Textual) (USD $)	Apr. 30, 2010	Jul. 31, 2012	Apr. 30, 2012	Oct. 01, 2009	Jul. 31, 2012 Common Stock [Member]	Apr. 30, 2012 Common Stock [Member]	Apr. 30, 2011 Common Stock [Member]	Apr. 30, 2010 Common Stock [Member]	Apr. 30, 2009 Common Stock [Member]	Apr. 30, 2008 Common Stock [Member]	Apr. 30, 2007 Common Stock [Member]	Apr. 30, 2006 Common Stock [Member]	Apr. 30, 2005 Common Stock [Member]	Apr. 30, 2004 Common Stock [Member]	Apr. 30, 2003 Common Stock [Member]	Apr. 30, 2002 Common Stock [Member]	Apr. 30, 2001 Common Stock [Member]	Feb. 19, 2001 Common Stock [Member]
Stockholders Equity Note Reverse Stock Split Conversion Ratio	1-for-5
Common Stock, Par or Stated Value Per Share		$ 0.001	$ 0.001
Common Stock Shares Authorized Prior To Reverse Stock Split				400,000,000
Common Stock Shares Authorized After Reverse Stock Split				80,000,000
Shares, Outstanding					33,160,660	29,470,660	29,470,660	9,470,660	47,353,200	36,753,200	34,183,200	31,949,920	7,042,500	7,042,500	6,642,500	6,500,000	4,000,000	0

TERRACE VENTURES INC 10-Q/A