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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Operating activities:    
Net income (loss) $ 685,000 $ (1,405,000)
Adjustments to reconcile net income (loss) to net cash from operating activities:    
Depreciation and amortization 3,234,000 3,124,000
(Gain) on sale of assets (1,000) 0
Loss on write down of investment in equity securities 0 2,114,000
Loss on early extinguishment of debt 108,000 0
Deferred income tax 176,000 16,000
Stock-based compensation expense 119,000 94,000
Other non-cash items 4,000 24,000
Changes in operating assets and liabilities:    
Receivables (767,000) (454,000)
Prepaid expenses and other assets (262,000) 64,000
Customer deposits/deferred revenue (108,000) (13,000)
Accounts payable and accrued liabilities 213,000 305,000
Net cash from operating activities 3,401,000 3,869,000
Investing activities:    
Payment for purchase of property and equipment (575,000) (1,344,000)
Investment in equity securities 0 (5,000)
Net cash (used in) investing activities (575,000) (1,349,000)
Financing activities:    
Principal payments on long-term debt (2,059,000) (979,000)
Principal payments on capital leases (2,055,000) (1,804,000)
Proceeds from long-term debt financing on property and equipment 0 1,023,000
Proceeds from certificate of deposit 0 9,000,000
Payments on line of credit 0 (8,780,000)
Capital contributions from non-controlling interests 7,000 27,000
Distributions to non-controlling interests (301,000) (268,000)
Proceeds from capital lease financing for reimbursement of payments for acquisition of equipment 1,137,000 0
Net cash (used in) financing activities (3,271,000) (1,781,000)
Net change in cash and cash equivalents (445,000) 739,000
Cash and cash equivalents at beginning of period 2,209,000 1,059,000
Cash and cash equivalents at end of period 1,764,000 1,798,000
Supplemental cash flow disclosure:    
Interest 1,066,000 889,000
Income taxes paid (refunds) 97,000 (6,000)
Schedule of non-cash investing and financing activities    
Acquisition of equipment with capital lease financing $ 7,401,000 $ 1,160,000