Note 5 - Stockholders' Equity (Tables)

9 Months Ended

Jan. 31, 2013

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Nine Months Ended January 31, 2013				Nine Months Ended January 31, 2012
Risk-free interest rate		2.97%				2.97%
Expected life, in years		6				6
Expected volatility		65.52	–	80.48%		73.43	–	73.61%
Dividend yield		0.0%				0.0%
Forfeiture rate		9.20%				9.60%

Schedule of Share-based Compensation, Activity [Table Text Block]

Stock Options	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contract Life
Outstanding options at April 30, 2012		234,250	$	3.78		5.32	Years
Granted		49,000	$	3.74		9.50	Years
Exercised		47,500	$	1.25
Forfeited		--		--
Outstanding options at January 31, 2013		235,750	$	4.28		6.55	Years
Outstanding exercisable at January 31, 2013		138,583	$	4.26		4.91	Years

Restricted Stock	Number of Shares		Weighted- Average Price		Weighted- Average Remaining Contract Life
Outstanding awards at April 30, 2012		7,200	$	5.01		9.00	Years
Granted		6,207	$	4.35		9.25	Years
Issued		2,400	$	5.01
Forfeited		--		--
Outstanding awards at January 31, 2013		11,007	$	4.64		9.14	Years
Outstanding vested at January 31, 2013		--	$	--

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			Options Outstanding						Options Exercisable
Range of Exercise Prices			Number Outstanding at January 31, 2013		Weighted- Average Remaining Contractual Life		Weighted- Average Exercise Price		Number Exercisable at  January 31, 2013		Weighted- Average Exercise Price
$3.01	-	$4.00		135,000	5.38	years	$	3.61		102,833	$	3.72
$4.01	-	$5.00		25,000	9.30	years	$	4.35		--		--
$5.01	-	$6.00		65,000	8.06	years	$	5.17		25,000	$	5.26
$6.01	-	$7.00		--	--			--		--		--
$7.01	-	$8.00		10,750	5.61	years	$	7.05		10,750	$	7.05
Total				235,750	6.55	years	$	4.28		138,583	$	4.26