UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011	Apr. 30, 2011
ASSETS
Cash and cash equivalents	$ 7,119	$ 10,457
Accounts receivable, net of allowance for doubtful accounts	832	585
Grant receivable	517	517
Prepaid expenses and other current assets	328	276
Total current assets	8,796	11,835
Restricted cash	150	0
Property and equipment, net	257	146
Goodwill	669	669
Total assets	9,872	12,650
LIABILITIES, REDEEMABLE COMMON STOCK AND STOCKHOLDERS' EQUITY (DEFICIT)
Accounts payable	1,294	1,580
Accrued liabilities	223	302
Deferred revenue	1,899	1,618
Total current liabilities	3,416	3,500
Warrant liability	684	972
Total liabilities	4,100	4,472
Redeemable common stock; $0.001 par value; 12,533,333 contingently puttable common shares outstanding as of October 31, 2011 and April 30, 2011	8,159	8,159
Stockholders' equity (deficit):
Preferred stock, $10 par value; 56,075 shares authorized; no shares issued and outstanding as of October 31, 2011 and April 30, 2011	0	0
Common stock, $.001 par value; 125,000,000 shares authorized, including redeemable common stock, 37,451,691 and 36,956,667 shares issued and 34,465,000 and 33,870,000 shares outstanding as of October 31, 2011 and April 30, 2011, respectively	37	37
Treasury stock, at cost, 3,236,000 common shares as of October 31, 2011 and April 30, 2011, respectively	(1,252)	(1,252)
Additional paid-in capital	19,750	17,784
Accumulated deficit	(20,869)	(16,482)
Accumulated other comprehensive income (loss)	(53)	(68)
Total stockholders' equity (deficit)	(2,387)	19
Total liabilities, redeemable common stock and stockholders' equity (deficit)	$ 9,872	$ 12,650