Income Taxes (Tables)

12 Months Ended

Apr. 30, 2012

Income Taxes [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2012			2011
Computed tax expense (benefit) at statutory rates	$	(5,000	)	$	228,000
Permanent differences	11,000			10,000
Change in effective tax rate	—			(481,000		)
State tax credits and other	5,000			—
Increase (decrease) in valuation allowance	(11,000		)	(357,000		)
	$	—		$	(600,000	)

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2012		2011
Current tax expense	$	—	$	8,000
Deferred tax benefit	—		(608,000		)
	$	—	$	(600,000	)

Summary of Operating Loss Carryforwards [Table Text Block]

Year of Expiration	NOL Carryforwards
2013	$	801,000
2019	2,268,000
2022	32,000
2023	1,000
2024	77,000
2026	253,000
2027	217,000
2029	28,000
2032	$	225,000
	$	3,902,000

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2012		2011
Net operating loss carryforwards	$	1,359,000	$	1,425,000
Inventory valuation reserve	150,000		157,000
Amortization and impairment of intangibles	271,000		391,000
Loss on equity and impairment in investee	427,000		427,000
Tax credit carryforwards	143,000		148,000
Other	91,000		121,000
	2,441,000		2,669,000
Less: valuation allowance	1,833,000		2,061,000
	$	608,000	$	608,000

Schedule of Current and Noncurrent Deferred Income Tax [Table Text Block]

	2012		2011
Current deferred income tax asset	$	116,000	$	250,000
Noncurrent deferred income tax asset	492,000		358,000
	$	608,000	$	608,000