Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
Nov. 30, 2014	Nov. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (7,217)us-gaap_NetIncomeLoss	$ (3,592)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation	726us-gaap_Depreciation	887us-gaap_Depreciation
Reduction in inventory value of discontinued operations	901us-gaap_InventoryWriteDown
Gain on sale of assets associated with discontinued operations	(670)
Gain on sale of idle property, plant and equipment		(162)
Change in assets and liabilities:
Accrued interest receivable		1
Accounts receivable	5,872	1,358
Inventories	469us-gaap_IncreaseDecreaseInInventories	(1,233)us-gaap_IncreaseDecreaseInInventories
Workers' compensation security deposit	551
Other current assets	(432)	(281)
Accounts payable, trade	(3,068)	(1,581)
Accrued liabilities	(264)	3,556
Other, net	(424)	(434)
Net cash from operating activities	(3,556)	(1,481)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from principal payments of U.S. Treasury Bills		16,998
Purchase of U.S. Treasury Bills		(17,999)
Proceeds from note receivable	25	24
Proceeds from sale of assets associated with discontinued operations	2,331
Proceeds from sale of idle property, plant and equipment		490
Purchase of property, plant and equipment	(163)	(460)
Other, net	156	229
Net cash from investing activities	2,349	(718)
Net decrease in cash	(1,207)	(2,199)
Cash at beginning of period	6,031us-gaap_Cash	11,838us-gaap_Cash
Cash at end of period	$ 4,824us-gaap_Cash	$ 9,639us-gaap_Cash

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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