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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities:      
Net loss (including noncontrolling interests) $ (7,835) $ (14,234) $ (13,080)
Adjustments to reconcile net loss to net cash used in operating activities:      
Stock-based compensation $ 1,075 1,729 $ 2,656
Bad debt expense 167
Depreciation and amortization $ 187 202 $ 144
Loss on disposal of property and equipment 28 16 8
Changes in operating assets and liabilities:      
Accounts receivable (239) (304) 1,155
Projects in process 38 530 (736)
Prepaid expenses and other current assets (263) (60) 95
Accounts payable and accrued expenses 871 363 19
Deferred revenues (1,925) (233) 938
Net cash used in operating activities (8,063) (11,824) (8,801)
Cash flows from investing activities:      
Purchase of property and equipment $ (198) (115) $ (155)
Proceeds from sale of property and equipment 7
Net cash used in investing activities $ (198) $ (108) $ (155)
Cash flow from financing activities:      
Proceeds from exercise of stock options 1,060
Proceeds from exercise of warrants $ 36 714
Proceeds from issuance of common stock, net of offering costs $ 5,422 $ 9,253 $ 6,892
Contributions from noncontrolling interests 3
Principal payments on capital lease obligations (57) $ (34)
Net cash provided by financing activities 5,368 9,255 $ 8,666
Effect of exchange rates on cash (154) (9) 8
Net decrease in cash (3,047) (2,686) (282)
Cash at beginning of year 6,129 8,815 9,097
Cash at end of year 3,082 6,129 $ 8,815
Supplemental disclosure of cash flow information:      
Cash paid for interest 18 14
Cash paid for income taxes $ 93 5 $ 109
Supplemental disclosure of non-cash investing and financing activities:      
Purchase of equipment with capital lease obligation $ 530