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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
Jul. 31, 2011
Apr. 30, 2011
ASSETS    
Cash and cash equivalents $ 8,839,000 $ 10,457,000
Accounts receivable 1,236,000 585,000
Grant receivable 504,000 517,000
Prepaid expenses and other current assets 341,000 276,000
Total current assets 10,920,000 11,835,000
Property and equipment, net 212,000 146,000
Goodwill 669,000 669,000
Total assets 11,801,000 12,650,000
LIABILITIES, COMMITMENTS AND CONTINGENCIES, REDEEMABLE COMMON STOCK AND STOCKHOLDERS' EQUITY (DEFICIT)    
Accounts payable 1,498,000 1,580,000
Accrued liabilities 264,000 302,000
Deferred revenue 2,077,000 1,618,000
Total current liabilities 3,839,000 3,500,000
Warrant liability 795,000 972,000
Total liabilities 4,634,000 4,472,000
Commitments and contingencies 0 0
Redeemable common stock; $0.001 par value; 12,533,333 contingently puttable common shares outstanding as of July 31, 2011 and April 30, 2011 8,159,000 8,159,000
Stockholders' equity (deficit):    
Preferred stock, $10 par value; 56,075 shares authorized; no shares issued and outstanding as of July 31, 2011 and April 30, 2011 0 0
Common stock, $.001 par value; 125,000,000 shares authorized, including redeemable common stock, 36,971,667 and 36,956,667 shares issued and 33,930,103 and 33,870,000 shares outstanding as of July 31, 2011 and April 30, 2011, respectively 37,000 37,000
Treasury stock, at cost, 3,236,000 common shares as of July 31, 2011 and April 30, 2011 (1,252,000) (1,252,000)
Additional paid-in capital 18,802,000 17,784,000
Accumulated deficit (18,519,000) (16,482,000)
Accumulated other comprehensive loss (60,000) (68,000)
Total stockholders' equity (992,000) 19,000
Total liabilities, redeemable common stock and stockholders' equity (deficit) $ 11,801,000 $ 12,650,000