Note 4 - Inventory (Tables)

3 Months Ended

Jul. 31, 2013

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	July 31, 2013		April 30, 2013
Raw material	$	2,825	$	2,395
Work-in-process		1,602		1,409
Finished goods		2,410		2,434
	$	6,837	$	6,238