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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
OPERATING ACTIVITIES      
Net income (loss) $ 2,250,000 $ (576,000) $ (562,000)
Adjustments to reconcile net income (loss) to net cash from operating activities:      
Depreciation and amortization 6,327,000 6,190,000 6,383,000
(Gain) on disposal of assets 0 0 (1,000)
Loss on early extinguishment of debt 108,000 0 0
Loss on write down investment in equity securities 0 2,140,000 0
Loss on sale of subsidiary 0 0 572,000
Deferred income tax 772,000 298,000 76,000
(Gain) on foreign currency transactions 0 0 (161,000)
Accrued interest on lease financing 414,000 0 0
Stock-based compensation expense 215,000 226,000 138,000
Other non-cash items 4,000 (31,000) 107,000
Changes in operating assets and liabilities:      
Receivables (1,230,000) 178,000 1,069,000
Prepaid expenses and other assets (283,000) (52,000) 11,000
Accounts payable, accrued liabilities and deferred revenue (199,000) 175,000 (859,000)
Net cash from operating activities 8,378,000 8,548,000 6,773,000
INVESTING ACTIVITIES      
Payment for purchase of property and equipment (1,612,000) (1,916,000) (5,212,000)
Investment in equity securities 0 (10,000) (8,000)
Proceeds from sale of subsidiary 0 0 768,000
Net cash used in investing activities (1,612,000) (1,926,000) (4,452,000)
FINANCING ACTIVITIES      
Principal payments on long-term debt (2,968,000) (2,058,000) (3,263,000)
Principal payments on capital leases (4,171,000) (4,026,000) (4,429,000)
Proceeds from long-term debt financing on property and equipment 570,000 1,016,000 2,625,000
Proceeds from certificate of deposit 0 9,000,000 0
Advances on line of credit 0 0 1,140,000
Payments on line of credit 0 (8,780,000) (1,200,000)
Capital contributions from non-controlling interests 7,000 46,000 117,000
Distributions to non-controlling interests (699,000) (670,000) (951,000)
Proceeds from warrants exercised 220,000 0 0
Private placements of common stock 0 0 1,800,000
Common stock repurchase 0 0 (2,000)
Proceeds from capital lease financing for reimbursement of payments for acquisition of equipment 1,137,000 0 0
Reclassification of restricted cash (200,000) 0 0
Proceeds from promissory notes 0 0 1,000,000
Net cash used in financing activities (6,104,000) (5,472,000) (3,163,000)
Net change in cash and cash equivalents 662,000 1,150,000 (842,000)
Effect of changes in foreign exchange rates on cash 0 0 (8,000)
CASH AND CASH EQUIVALENTS, beginning of year 2,209,000 1,059,000 1,909,000
CASH AND CASH EQUIVALENTS, end of year 2,871,000 2,209,000 1,059,000
SUPPLEMENTAL CASH FLOW DISCLOSURE      
Cash paid for interest 2,150,000 1,670,000 2,070,000
Cash paid for income taxes 266,000 25,000 41,000
SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES      
Acquisition of equipment with capital lease financing 8,878,000 1,343,000 3,709,000
Warrants issued with promissory notes 0 0 145,000
Nonmonetary equipment trade-in 0 0 700,000
Equipment relieved in sale of subsidiary 0 0 (4,921,000)
Other assets relieved in sale of subsidiary 0 0 (826,000)
Debt relieved in sale of subsidiary 0 0 5,181,000
Other liabilities relieved in sale of subsidiary 0 0 14,000
Net equity relieved in sale of subsidiary 0 0 1,351,000
OCI released to net income in sale of subsidiary 0 0 (779,000)
Investment released to net income in sale of subsidiary $ 0 $ 0 $ (1,360,000)