Out of Period Adjustment (Details) (USD $)	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2011 Scenario, Previously Reported [Member]	Apr. 30, 2010 Scenario, Previously Reported [Member]	Apr. 30, 2009 Scenario, Previously Reported [Member]	Apr. 30, 2008 Scenario, Previously Reported [Member]	Apr. 30, 2011 Restatement Adjustment [Member]	Apr. 30, 2010 Restatement Adjustment [Member]	Apr. 30, 2009 Restatement Adjustment [Member]	Apr. 30, 2008 Restatement Adjustment [Member]	Apr. 30, 2011 Restated [Member]	Apr. 30, 2010 Restated [Member]	Apr. 30, 2009 Restated [Member]	Apr. 30, 2008 Restated [Member]
Net Income (Loss) Attributable to Parent	$ (16,000)	$ 1,256,000	$ 1,233,000	$ (27,000)	$ 303,000	$ 165,000	$ 23,000	$ 23,000	$ 14,000	$ 39,000	$ 1,256,000	$ (4,000)	$ 317,000	$ 204,000
Earnings Per Share, Basic	$ 0.00	$ 0.21	$ 0.21	$ (0.01)	$ 0.06	$ 0.03	$ 0.00	$ 0.01	$ 0.00	$ 0.01	$ 0.21	$ 0.00	$ 0.06	$ 0.04