Note 1 - Nature of Business and Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended		9 Months Ended	12 Months Ended			3 Months Ended		9 Months Ended				12 Months Ended	9 Months Ended	12 Months Ended						12 Months Ended
	May 31, 2014	Aug. 19, 2011	May 31, 2012	May 31, 2014	May 31, 2013	May 31, 2012	Aug. 19, 2011 Predecessor [Member]	May 31, 2011 Predecessor [Member]	May 31, 2012 Successor [Member]	May 31, 2014 Successor [Member]	May 31, 2013 Successor [Member]	Aug. 19, 2011 Successor [Member]	May 31, 2013 Cost of Sales [Member] LIFECODES [Member]	Feb. 28, 2014 Geographic Concentration Risk [Member] UNITED STATES Cash and Cash Equivalents [Member]	May 31, 2014 Geographic Concentration Risk [Member] UNITED STATES Cash and Cash Equivalents [Member]	May 31, 2013 Geographic Concentration Risk [Member] UNITED STATES Cash and Cash Equivalents [Member]	May 31, 2014 Geographic Concentration Risk [Member] Europe [Member] Accounts Receivable [Member]	May 31, 2013 Geographic Concentration Risk [Member] Europe [Member] Accounts Receivable [Member]	Aug. 19, 2011 Immucor Acquisition [Member]	Mar. 22, 2013 LIFECODES [Member]	May 31, 2014 In Process Research and Development [Member]	May 31, 2013 In Process Research and Development [Member]	May 31, 2012 In Process Research and Development [Member]	May 31, 2014 Uncollectible Receivables [Member]	May 31, 2014 Service Life [Member]	May 31, 2013 Minimum [Member]	May 31, 2013 Maximum [Member]
Note 1 - Nature of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Additional Paid in Capital	$ 753,147,000			$ 753,147,000	$ 751,635,000		$ 0
Cash and Cash Equivalents, at Carrying Value	23,621,000		18,578,000	23,621,000	29,388,000	18,578,000	322,963,000	302,603,000	18,578,000	23,621,000	29,388,000	322,963,000
Concentration Risk, Percentage														19.00%	19.00%	38.00%	50.00%	50.00%
Accounts Receivable, Net	69,600,000			69,600,000	68,100,000
Allowance for Doubtful Accounts Receivable, Period Increase (Decrease)																								1,900,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income																								1,100,000	3,600,000
Inventory Adjustments																			24,400,000	4,500,000
Inventory Write-down													1,700,000
Property, Plant and Equipment, Useful Life				10 years	5 years																					3 years	30 years
Depreciation				18,300,000	21,000,000		3,400,000		15,500,000																(6,300,000)
Goodwill, Impairment Loss	160,000,000			160,000,000	0	0
Impairment of Intangible Assets, Finite-lived																					200,000	3,500,000	0
Shipping, Handling and Transportation Costs		$ 3,952,000	$ 14,333,000	$ 20,165,000	$ 18,718,000		$ 3,952,000		$ 14,333,000