Summary of Significant Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2014

Accounting Policies [Abstract]

Accounts receivable

	April 30, 2014			April 30, 2013
Trade receivables	$	3,758,000		$	2,962,000
VAT receivable		125,000			123,000
Allowance for doubtful accounts and sales returns		(220,000	)		(200,000	)
	$	3,663,000		$	2,885,000

Changes in goodwill

	2014		2013
Opening balance May 1	$	1,083,000	$	1,453,000
Contingent purchase price		—		68,000
Impairment charge		—		(438,000	)
Goodwill balance April 30	$	1,083,000	$	1,083,000

The components of finite-lived intangible assets acquired

As of April 30, 2014, the components of finite-lived intangible assets acquired are as follows:

	Gross		Weighted				Net
	Carrying		Average		Accumulated		Carrying
	Amount		Life		Amortization		Amount
Customer relationships	$	758,000		2 Years	$	758,000	$	0
Trade names		733,000		5 Years		733,000		0
Non-compete agreement		68,000		4 Years		68,000		0
	$	1,559,000			$	1,559,000	$	0

As of April 30, 2013, the components of finite-lived intangible assets acquired were as follows:

	Gross		Weighted				Net
	Carrying		Average		Accumulated		Carrying
	Amount		Life		Amortization		Amount
Customer relationships	$	758,000		2 Years	$	758,000	$	0
Trade names		733,000		5 Years		600,000		133,000
Non-compete agreement		68,000		4 Years		68,000		0
	$	1,559,000			$	1,426,000	$	133,000

The assets and liabilities measured at fair value on a nonrecurring basis, by input level, in the consolidated balance sheet

	Quoted								Total
	Prices in								Reduction
	Active Markets for		Significant Other		Significant				in Fair value
Balance Sheet	Identical Assets or		Observable Inputs		Unobservable		April 30, 2014		Recorded as of
Location	Liabilities (Level 1)		(Level 2)		Inputs (Level 3)		Total		April 30, 2014
Assets:
Goodwill	$	—	$	—	$	1,083,000	$	1,083,000	$	(438,000	)

Reconciliation of the numerator and denominator used in computing basic and diluted net loss per share

	Year ended April 30, 2014
	Loss			Shares		Per share
	(numerator)			(denominator)		amount
Basic net loss per share-net loss and weighted average common shares outstanding	$	(2,609,000	)		1,999,856	$	(1.30	)
Effect of dilutive securities-stock options		—			—		—
Diluted net loss per share -net loss weighted average common shares outstanding and effect of stock options	$	(2,609,000	)		1,999,856	$	(1.30	)

		Year ended April 30, 2013
		Loss		Shares		Per share
		(numerator)		(denominator)		amount
Basic net loss per share-net loss and weighted average common shares outstanding	$	(4,625,000	)	1,776,796	$	(2.60	)
Effect of dilutive securities-stock options		—		—		—
Diluted net loss per share-net loss weighted average common shares outstanding and effect of stock options	$	(4,625,000	)	1,776,796	$	(2.60	)

		Year ended April 30, 2012
		Loss		Shares		Per share
		(numerator)		(denominator)		amount
Basic net loss per share-net loss and weighted average common shares outstanding	$	(3,259,000	)	1,770,952	$	(1.84	)
Effect of dilutive securities-stock options		—		—		—
Diluted net loss per share-net loss, weighted average common shares outstanding and effect of stock options	$	(3,259,000	)	1,770,952	$	(1.84	)

Product warranty accruals

	Balance		Charges to					Balance
	Beginning		Costs and					End
	of Year		Expenses		Deductions			of Year
Year Ended April 30, 2014	$	69,000	$	9,000	$	(9,000	)	$	69,000
Year Ended April 30, 2013	$	79,000	$	14,000	$	(24,000	)	$	69,000
Year Ended April 30, 2012	$	79,000	$	6,000	$	(6,000	)	$	79,000

Summary of option activity

	Options Outstanding
				Exercise		Weighted
				price		average
	Shares			per share		exercise price
Balance April 30, 2011		260,867			$ 7.68-47.88	$	16.72
Granted		48,000			6.36-6.72		6.59
Exercised		—			—		—
Expired		(55,884	)		6.72-47.88		21.67
Balance April 30, 2012		252,983			$ 6.36-24.54	$	13.70
Granted		41,667			2.44-4.14		4.14
Exercised		—			—		—
Expired		(14,408	)		6.72-24.54		15.49
Balance April 30, 2013		280,242			$ 2.44-24.54	$	12.04
Granted		—			—		—
Exercised		—			—		—
Expired		(34,665	)		6.72-24.54		10.41
Balance April 30, 2014		245,577			$ 2.44-19.20	$	12.27

The fair value of each stock option granted during the year

	2014		2013		2012
Expected life (years)		—		3.0 to 5.75		3.0 to 3.3
Expected volatility		—		77%		77%
Expected dividend yield		—		—		—
Expected forfeiture rate		—		5.0%		5.0%
Risk-free interest rate		—		0.5% to 0.6%		0.5% to 0.6%
Weighted average fair value of options granted during the year		—	$	0.90	$	0.56