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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Operating activities:    
Net income (loss) $ 490,000 $ 351,000
Adjustments to reconcile net income to net cash from operating activities:    
Depreciation and amortization 2,880,000 3,021,000
Stock based compensation expense 77,000 56,000
Gain on sale of assets (53,000) 0
Changes in operating assets and liabilities:    
Receivables (677,000) (380,000)
Prepaid expenses and other assets (297,000) (17,000)
Customer deposits/deferred revenue 103,000 0
Accounts payable and accrued liabilities 556,000 (250,000)
Net cash from operating activities 3,079,000 2,781,000
Investing activities:    
Proceeds received towards equipment held for sale 1,654,000  
Payment for purchase of property and equipment (1,770,000) (249,000)
Net cash from investing activities (116,000) (249,000)
Financing activities:    
Cash distributions to non-controlling interests (627,000) (247,000)
Advances on line of credit 0 600,000
Payments on line of credit (800,000) 0
Investment in subsidiaries by non-controlling interests 970,000 0
Principal payments on capital leases (1,422,000) (950,000)
Principal payments on long-term debt (1,704,000) (2,241,000)
Net cash from financing activities (3,583,000) (2,838,000)
Net change in cash and cash equivalents (620,000) (306,000)
Cash and cash equivalents at beginning of period 1,438,000 833,000
Cash and cash equivalents at end of period 818,000 527,000
Supplemental cash flow disclosure:    
Interest 1,237,000 1,188,000
Income taxes 40,000 53,000
Schedule of non-cash investing and financing activities    
Acquisition of equipment with capital lease financing $ 3,472,000 $ 3,578,000