STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities:
Net income/(loss)	$ 69	$ (148)
Adjustment to reconcile net income/(loss) to net cash used in operating activities:
Depreciation and amortization	183	361
Stock compensation expense	94	88
Changes in assets and liabilities related to operations:
Trade accounts receivable	(1,725)	(1,197)
Inventories	9	65
Prepaid expenses and other assets	35	(195)
Accounts payable	335	156
Accrued expenses	432	178
Net cash used in operating activities	(568)	(692)
Investing activities:
Proceeds from disposal of equipment	96
Acquisition of equipment and leasehold improvements	(77)	(63)
Payment of accounts payable incurred for the purchase of equipment and leasehold improvements		(37)
Net cash provided by/(used in) investing activities	19	(100)
Financing activities:
Principal payments on capital leases	(82)	(47)
Proceeds from common stock issuance		988
Proceeds from exercise of stock options	2
Net cash (used in)/provided by financing activities	(80)	941
(Decrease)/increase in cash and cash equivalents	(629)	149
Cash and cash equivalents at beginning of period	1,779	1,275
Cash and cash equivalents at end of period	1,150	1,424
Supplemental cash flow information:
Interest paid	16	8
Supplemental non-cash investing and financing activities:
Receivable from sale of property and equipment	40
Accounts payable incurred for the purchase of equipment and leasehold improvements	5	$ 11
Proceeds from capital lease	$ 227