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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash flows from operating activities:    
Net loss (including noncontrolling interests) $ (5,077) $ (5,232)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 224 948
Loss on disposal of property and equipment 91 28
Depreciation and amortization 206 138
Changes in operating assets and liabilities:    
Accounts receivable 1,066 617
Projects in process 95 (847)
Inventory (940)
Prepaid expenses and other current assets (438) (231)
Accounts payable and accrued expenses 319 1,221
Deferred revenues 737 (1,528)
Net cash used in operating activities (3,717) (4,886)
Cash flows from investing activities:    
Purchase of property and equipment (851) (137)
Investment in joint venture (3)
Proceeds from sale of property and equipment 5
Net cash used in investing activities (849) (137)
Cash flows from financing activities:    
Proceeds from issuance of common stock and warrants, net of offering costs 7,911
Contributions from noncontrolling interests 3
Principal payments on capital lease obligations (57) (43)
Net cash provided by (used in) financing activities 7,854 (40)
Effect of exchange rate changes on cash (92) (116)
Net change in cash 3,196 (5,179)
Cash at beginning of period 3,082 6,129
Cash at end of period 6,278 950
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 179 41
Cash paid for interest $ 15 $ 12