Annual report pursuant to Section 13 and 15(d)

Income Taxes - The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities (Details)

v2.4.0.8
Income Taxes - The tax effect of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities (Details) (USD $)
Apr. 30, 2013
Apr. 30, 2012
Deferred tax assets:    
Compensated absences and severance, principally due to accruals for financial reporting purposes $ 150,000 $ 99,000
Stock-based compensation expense 1,259,000 1,202,000
Accounts receivable, principally due to allowance for doubtful accounts and sales returns 78,000 78,000
Property and equipment, principally due to differences in depreciation 106,000 253,000
Intangible assets 464,000 360,000
Inventories 91,000 88,000
Domestic net operating losses 9,089,000 7,491,000
Alternative minimum tax 438,000 438,000
Other 61,000 66,000
Deferred tax assets 11,736,000 10,075,000
Valuation allowance (11,736,000) (10,075,000)
Net deferred tax assets $ 0 $ 0