CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
OPERATING ACTIVITIES
Net loss	$ (110)	$ (379)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	369	400
Amortization of finite-lived intangible assets	32	35
Stock-based compensation	(13)	187
Gain on disposal of assets	(36)	(67)
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable, net	(531)	304
Decrease in inventories, net	69	406
Decrease in other assets	14	50
Increase (decrease) in trade accounts payable, accrued compensation and commissions expense, accrued warranty expense and other accrued liabilities	249	(522)
Net cash provided by operating activities	43	414
INVESTING ACTIVITIES
Capital expenditures	(76)	(269)
Other	43	94
Net cash used in investing activities	(33)	(175)
Increase in cash and cash equivalents	10	239
Cash and cash equivalents at beginning of period	5,553	5,192
Cash and cash equivalents at end of period	5,563	5,431
Supplemental Disclosure:
Cash paid for interest	6	0
Cash paid for income taxes	$ 27	$ 5