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Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Feb. 28, 2014
Feb. 28, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (12,778) $ (15,302)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 3,129 4,183
Stock-based compensation expense 1,048 977
Bad debt expense 49 805
Provisions for inventory write-downs 737 1,208
Equity in losses from unconsolidated entities, net 130 98
Income recognized on patents assignment (26) (26)
Changes in operating assets and liabilities, net of acquisition:    
Accounts receivable, net (365) 730
Inventories (1,182) 1,789
Prepaid expenses and other (821) (355)
Accounts payable 529 (792)
Accrued expenses and other current liabilities (81) (801)
Net cash used in operating activities (9,631) (7,486)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of property, plant and equipment (1,411) (2,043)
Purchase of investments (76) (2,873)
Payments related to acquisition of business (2,069)  
Payments for development of intangible assets (126) (266)
Proceeds from sale of short-term investments   8,831
Increase in restricted cash (97)  
Proceeds from return of investment in unconsolidated entity   250
Other investing activities, net (83) 5
Net cash provided by (used in) investing activities (3,862) 3,904
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from line of credit 170  
Payments on line of credit (170) (1,623)
Proceeds from long-term debt   1,820
Payments of long-term debt (1,115) (490)
Payment of loan from related party (101)  
Other financing activities 3 4
Net cash used in financing activities (1,213) (289)
Effect of exchange rate changes on cash and cash equivalents (55) 529
NET DECREASE IN CASH AND CASH EQUIVALENTS (14,761) (3,342)
CASH AND CASH EQUIVALENTS-Beginning of period 36,272 47,228
CASH AND CASH EQUIVALENTS-End of period 21,511 43,886
NONCASH INVESTING AND FINANCING ACTIVITIES:    
Accrual related to property, plant and equipment $ 350 $ 1,487