Note 12. Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Mar. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Fiscal Year Ended March 31, 2013
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Total
Net sales	$	3,396		$	3,739		$	3,952		$	4,200		$	15,287
Gross profit	$	913		$	1,070		$	1,132		$	1,227		$	4,342
Net loss	$	(2,647	)	$	(4,264	)	$	(1,577	)	$	(2,069	)	$	(10,557	)
Net loss per common share - basic and diluted	$	(0.06	)	$	(0.09	)	$	(0.03	)	$	(0.04	)	$	(0.23	)

	Fiscal Year Ended March 31, 2012
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Total
Net sales	$	3,756		$	4,025		$	4,314		$	4,591		$	16,686
Gross profit	$	1,128		$	1,397		$	1,357		$	1,203		$	5,085
Net loss	$	(2,630	)	$	(2,953	)	$	(2,342	)	$	(3,091	)	$	(11,016	)
Net loss per common share - basic and diluted	$	(0.06	)	$	(0.07	)	$	(0.05	)	$	(0.07	)	$	(0.25	)