BENEFIT PLANS: (Details 7) - $ / shares	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Number of Shares - Non-vested	28,000	24,000
Number of Shares - Granted	3,000	12,000
Number of Shares - Vested	(12,000)	(8,000)
Number of Shares - Forfeited	0	0
Number of Shares - Non-vested	19,000	28,000
Weighted Average Grant Date Fair Value Non-vested	$ 6.98	$ 6.96
Weighted Average Grant Date Fair Value Granted	5.22	6.90
Weighted Average Grant Date Fair Value Vested	6.94	6.80
Weighted Average Grant Date Fair Value Forfeited	0	0
Weighted Average Grant Date Fair Value Non-vested	$ 6.66	$ 6.98