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DISCONTINUED OPERATIONS (Details) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2010
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2009
Dec. 31, 2011
Summary of operating results of the discontinued operations          
Loss from discontinued operations, net of tax   $ (625,000) $ (2,138,000)    
Summary of balance sheet data for discontinued operations          
Total current assets associated with discontinued operations   3,871,000     4,013,000
Total current liabilities associated with discontinued operations   6,044,000     6,383,000
Venezuela
          
Discontinued Operations          
Expropriation of investments subject to policy limit       50,000,000  
Insurance policy receivable       50,000,000  
Collection of receivables 50,000,000        
Asset impairment charges excluding insurance proceeds       379,700,000  
Asset impairment charges       329,700,000  
Summary of operating results of the discontinued operations          
Expenses and selling, general and administrative   172,000 456,000    
Loss attributable to expropriation   13,000 1,313,000    
Other (income) loss, net     (81,000)    
Provision for income taxes   440,000 450,000    
Loss from discontinued operations, net of tax   (625,000) (2,138,000)    
Summary of balance sheet data for discontinued operations          
Cash   159,000     304,000
Accounts receivable   5,000     9,000
Inventory   1,017,000     1,017,000
Other current assets   2,690,000     2,683,000
Total current assets associated with discontinued operations   3,871,000     4,013,000
Accounts payable   560,000     589,000
Accrued liabilities   3,985,000     4,295,000
Deferred revenues   1,499,000     1,499,000
Total current liabilities associated with discontinued operations   6,044,000     6,383,000
Other long-term liabilities   14,462,000     14,140,000
Total liabilities associated with discontinued operations   $ 20,506,000     $ 20,523,000