Note 6 - Goodwill (Tables)

3 Months Ended

Aug. 31, 2013

Disclosure Text Block Supplement [Abstract]

Schedule of Goodwill [Table Text Block]

	August 31, 2013		May 31, 2013
Balance at beginning of period	$	1,003,463		966,338
Additions:
Acquisition of LIFECODES		-		36,889
Foreign currency translation adjustment		326		236
Balance at end of period	$	1,003,789		1,003,463