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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
OPERATING ACTIVITIES      
Net income $ 813,000 $ 1,489,000 $ 806,000
Adjustments to reconcile net income to net cash from operating activities:      
Depreciation and amortization 6,096,000 6,272,000 6,001,000
Loss (gain) on disposal of assets 3,000 (72,000) 0
Deferred income tax 25,000 76,000 168,000
(Gain) loss on foreign currency transactions (130,000) 0 0
Stock-based compensation expense 74,000 125,000 110,000
Changes in operating assets and liabilities:      
Receivables 655,000 (961,000) 76,000
Prepaid expenses and other assets (316,000) (1,063,000) (76,000)
Accounts payable and accrued liabilities (349,000) 957,000 99,000
Net cash from operating activities 6,871,000 6,823,000 7,184,000
INVESTING ACTIVITIES      
Payment for purchase of property and equipment (6,634,000) (5,613,000) (315,000)
Investment in convertible preferred stock (31,000) (39,000) 0
Net cash from investing activities (6,665,000) (5,652,000) (315,000)
FINANCING ACTIVITIES      
Principal payments on long-term debt (6,818,000) (3,889,000) (5,381,000)
Principal payments on capital leases (3,732,000) (2,983,000) (2,784,000)
Long term debt financing on property and equipment 9,219,000 6,980,000 928,000
Proceeds from capital lease financing on property and equipment 0 0 1,000,000
Advances on line of credit 1,300,000 350,000 600,000
Payments on line of credit (600,000) (1,000,000) 0
Capital contributions from non-controlling interests 217,000 1,509,000 0
Distributions to non-controlling interests (780,000) (996,000) (627,000)
Stock repurchase (28,000) 0 0
Net cash from financing activities (1,222,000) (29,000) (6,264,000)
Net change in cash and cash equivalents (1,016,000) 1,142,000 605,000
CASH AND CASH EQUIVALENTS, beginning of year 2,580,000 1,438,000 833,000
CASH AND CASH EQUIVALENTS, end of year 1,564,000 2,580,000 1,438,000
SUPPLEMENTAL CASH FLOW DISCLOSURE      
Cash paid for interest 2,352,000 2,503,000 2,446,000
Cash paid for income taxes 158,000 90,000 88,000
SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES      
Acquisition of equipment with capital lease financing $ 264,000 $ 6,400,000 $ 9,706,000