CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 30, 2015	Apr. 30, 2014
Current assets:
Cash and cash equivalents	$ 9,357	$ 5,891
Accounts receivable, net	1,060	1,325
Prepaid expenses and other current assets	346	383
Total current assets	10,763	7,599
Restricted cash	163	165
Property and equipment, net	452	434
Goodwill	669	669
Total assets	12,047	8,867
Current liabilities:
Accounts payable	1,414	981
Accrued liabilities	373	587
Deferred revenue	2,009	2,091
Total current liabilities	3,796	3,659
Warrant liability	0	2,011
Other Non-current liability	192	0
Total liabilities	3,988	5,670
Stockholders' equity:
Common stock, $.001 par value; 200,000,000 and 125,000,000 shares authorized; 107,561,338 and 70,122,086 shares issued and 104,425,102 and 66,885,850 shares outstanding as of April 30, 2015 and 2014, respectively	108	70
Treasury stock, at cost, 3,236,236 common shares as of April 30, 2015 and 2014	(1,252)	(1,252)
Additional paid-in capital	61,223	43,259
Accumulated deficit	(52,020)	(38,880)
Total stockholders' equity	8,059	3,197
Total liabilities and stockholders' equity	$ 12,047	$ 8,867

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.