Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2015	Aug. 31, 2014
OPERATING ACTIVITIES:
Net loss	$ (7,217)	$ (5,479)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	17,049	18,395
Noncash interest expense	2,695	2,422
Loss on disposition and retirement of fixed assets	125	47
Provision (recoveries) for doubtful accounts	19	56
Share-based compensation expense	887	518
Deferred income taxes	(3,903)	(4,035)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable, trade	2,328	(3,295)
Income taxes	300	71
Inventories	(7,916)	(1,764)
Other assets	330	555
Accounts payable	2,174	2,119
Deferred revenue	247	288
Accrued expenses and other liabilities	(15,025)	(10,204)
Cash used in operating activities	(7,907)	(306)
INVESTING ACTIVITIES:
Purchases of property and equipment	(1,991)	(3,285)
Other investments	(3,100)
Acquisitions of businesses, net of cash acquired	(750)	(241)
Cash used in investing activities	(5,841)	(3,526)
FINANCING ACTIVITIES:
Repayments of long-term debt	(1,662)	(1,664)
Proceeds from Revolving Facility	20,000	8,000
Repayments of Revolving Facility	(4,000)	(8,000)
Cash provided by (used in) financing activities	14,338	(1,664)
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS	74	(770)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	664	(6,266)
Cash and cash equivalents at beginning of period	18,363	23,621
Cash and cash equivalents at end of period	19,027	17,355
SUPPLEMENTAL INFORMATION:
Income taxes paid, net of refunds	700	933
Interest paid	30,783	30,529
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Movement from inventory to property and equipment of instruments placed on rental agreements	$ 1,297	$ 1,717