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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Nov. 30, 2015
Nov. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 872 $ (7,217)
Adjustments to reconcile net income (loss) to net cash from operating activities:    
Depreciation 520 726
Reduction in inventory value of discontinued operations   901
Gain on sale of assets associated with discontinued operations   (670)
Share-based compensation 35  
Amortization of debt financing costs 39  
Change in assets and liabilities:    
Accounts receivable 979 5,872
Inventories (1,640) 469
Workers' compensation security deposit 940 551
Other current assets (923) (432)
Accounts payable, trade 111 (3,068)
Accrued liabilities 1,329 (264)
Other, net (183) (424)
Net cash from operating activities 2,079 (3,556)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from note receivable   25
Proceeds from sale of assets associated with discontinued operations   2,331
Purchase of property, plant and equipment (245) (163)
Other, net (25) 156
Net cash from investing activities (270) 2,349
Net increase (decrease) in cash 1,809 (1,207)
Cash at beginning of period 4,995 6,031
Cash at end of period $ 6,804 $ 4,824