STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net loss	$ (1,283)	$ (1,192)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	610	735
Impairment of fixed asset	54
Share-based compensation	207	182
Changes in assets and liabilities related to operations:
Trade accounts receivable	73	(119)
Inventories	(110)	288
Prepaid expenses and other assets	(194)	120
Accounts payable	161	(14)
Accrued expenses	241	(240)
Net cash used in operating activities	(241)	(240)
Investing activities:
Acquisition of equipment and leasehold improvements	(128)	(280)
Payment of accounts payable incurred for the purchase of equipment and leasehold improvements	(37)	(8)
Net cash used in investing activities	(165)	(288)
Financing activities:
Principal payment on capital leases	(96)	(85)
Proceeds from sale of common stock	988
Proceeds from exercise of stock options	18	26
Net cash provided by (used in) financing activities	910	(59)
Increase/(Decrease) in cash and cash equivalents	504	(587)
Cash and cash equivalents at beginning of period	1,275	1,862
Cash and cash equivalents at end of period	1,779	1,275
Supplemental cash flow information:
Interest paid	15	14
Supplemental non-cash investing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements		37
Capital lease obligations incurred in the purchase of equipment	$ 75	$ 132