Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
Oct. 31, 2015
Apr. 30, 2015
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts and sales returns $ 130,000 $ 140,000
Accumulated depreciation and amortization $ 1,014,831 $ 966,831
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, authorized shares 1,300,000 1,300,000
Preferred stock, outstanding shares 544,600 626,600
Common stock, par value $ 1 $ 1
Common stock, authorized shares 54,000,000 54,000,000
Common stock, issued shares 3,925,870 2,776,012
Common stock, outstanding shares 3,925,870 2,776,012