Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss (including noncontrolling interests)	$ (2,075)	$ (2,064)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	29	39
Depreciation and amortization	536	400
Changes in operating assets and liabilities:
Accounts receivable	532	339
Projects in process	(224)	(182)
Inventory	(56)	(1,323)
Prepaid expenses and other current assets	45	(38)
Accounts payable and accrued expenses	219	344
Deferred revenues	(437)	(548)
Net cash used in operating activities	(1,431)	(3,033)
Cash flows from investing activities:
Purchase of property and equipment	(145)	(605)
Net cash used in investing activities	(145)	(605)
Cash flows from financing activities:
Proceeds from note payable		1,713
Principal payments on capital lease obligations	(277)	(160)
Net cash (used in) provided by financing activities	(277)	1,553
Effect of exchange rate changes on cash	(250)	17
Net decrease in cash	(2,103)	(2,068)
Cash at beginning of period	5,796	3,476
Cash at end of period	3,693	1,408
Supplemental disclosure of cash flow information:
Cash paid for income taxes	8	10
Cash paid for interest	27	30
Supplemental disclosure of non-cash investing and financing activities
Purchase of equipment with capital lease obligations		$ 1,268