Quarterly report pursuant to Section 13 or 15(d)


6 Months Ended
Oct. 31, 2015
Stockholders' Equity Note [Abstract]  
Preferred Shares
Series H Preferred Stock
On June 30, 2015, the Company entered into Amendment, Waiver and Exchange Agreements (the “Exchange Agreements”) with certain of its promissory note holders, who held $1,299,000 in principal amount of unsecured promissory notes of the Company. Pursuant to the terms of the Exchange Agreements, the Holders agreed to exchange all of the existing indebtedness for, and the Company agreed to issue to the Holders, an aggregate of 8,435 shares of the Company’s newly designated Series H Convertible Preferred Stock, par value $0.0001 per share (“Series H Preferred Stock”). The 8,435 shares of Series H Preferred Stock are each convertible into 100 shares of common stock at $1.54 each (the market value of the stock on date of issuance) and therefore no gain or loss was recorded on the extinguishment of debt. For the period from July 2, 2015 to October 31, 2015, holders of Series H preferred stock have converted 5,617 shares of Series H preferred into 561,700 shares of common stock.
Series H-1 Preferred Stock
Between July 14 and July 20, 2015, the Company entered into a Securities Purchase Agreement (the “Securities Purchase Agreement”) with four Investors pursuant to which the Company issued to the Investors an aggregate of 8,532 shares of Series H-1 Preferred Convertible Stock of the Company, par value $0.0001 per share (“Series H-1 Shares”), and warrants to purchase 1,279,759 shares of common stock of the Company, par value $0.0001 per share (“Common Stock”), with an exercise price of between $1.63 and $1.66 per share (the “Warrants”). The purchase price for each Series H-1 Share was between $163 and $166 and the purchase price for each warrant was $0.1250 per share of Common Stock, for an aggregate purchase price for the Series H-1 Shares and Warrants of $1,575,000.
The Company has determined that the Warrants qualify for accounting as equity classification. On the issuance date, the Company estimated the fair value of the Warrants at $1,649,000 under the Black-Scholes option pricing model using the following primary assumptions: contractual term of  5.0 years, volatility rate of  103%, risk-free interest rate of  2% and expected dividend rate of  0%. Based on the Warrant’s relative fair value to the fair value of the Series H-1 Preferred Convertible Stock, approximately $841,000 of the $1,575,000 of proceeds was allocated to the Warrants, creating a corresponding preferred stock discount in the same amount. 
Due to the reduction of allocated proceeds to Series H-1 Shares the effective conversion price was approximately $0.80 per share or $704,000 in aggregate. Since the conversion option of the preferred stock was immediately exercisable, the amount allocated to the BCF was immediately accreted to preferred dividends, resulting in an increase in the carrying value of the preferred stock. On July 14 and July 20, 2015, the Company recorded total deemed dividend of $704,000 related to the beneficial conversion feature with the issuance of the Series H-1 Preferred Convertible Stock.
Each share of Series H-1 Preferred Stock has a stated value of $166 and is convertible into shares of Common Stock, equal to the stated value divided by the conversion price of $1.66 per share (subject to adjustment in the event of stock splits and dividends).  
Conversion of preferred shares
For the six month period ended October 31,2015 the company issued approximately 1,273,000 common stock conversion shares, 185,000 common stock make-whole shares and 39,000 common stock dividend shares upon the conversion of series F, F-1, G, G-1 and H preferred shares.
Common Stock Purchase Warrants
The following is an approximate summary of the common stock warrant activity for the six months ended October 31, 2015: 
Number of
Life in years
Outstanding, April 30, 2015
Warrants issued in connection with Series H-1 preferred stock for cash
Outstanding, October 31, 2015