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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Feb. 29, 2016
Feb. 28, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 352 $ (10,214)
Adjustments to reconcile net income (loss) to net cash from operating activities:    
Depreciation 780 1,034
Reduction in inventory value of discontinued operations   901
Gain on sale of assets associated with discontinued operations   (670)
Share-based compensation 57  
Amortization of debt financing costs 58  
Change in assets and liabilities:    
Accounts receivable 2,550 7,642
Inventories (1,804) 928
Workers' compensation security deposit (17) 551
Other current assets 23 (211)
Accounts payable, trade (652) (3,382)
Accrued liabilities 491 (1,077)
Other, net (212) (516)
Net cash from operating activities 1,626 (5,014)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from note receivable   1,631
Proceeds from sale of assets associated with discontinued operations   2,331
Purchase of property, plant and equipment (312) (178)
Other, net (49) 132
Net cash from investing activities (361) 3,916
Net increase (decrease) in cash 1,265 (1,098)
Cash at beginning of period 4,995 6,031
Cash at end of period $ 6,260 $ 4,933