Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES
Net loss	$ (126)	$ (178)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	190	202
Amortization of finite-lived intangible assets	14	26
Stock-based compensation	(16)	13
Gain on disposal of assets	(43)	0
Changes in operating assets and liabilities:
Decrease in accounts receivable, net	62	114
(Increase) decrease in inventories, net	(4)	168
Increase in other assets	(69)	(36)
Increase in trade accounts payable, accrued compensation and commissions expense, accrued warranty expense and other accrued liabilities	63	(197)
Net cash provided by operating activities	71	112
INVESTING ACTIVITIES
Capital expenditures	(48)	(256)
Net cash used in investing activities	(48)	(256)
Increase (decrease) in cash and cash equivalents	23	(144)
Cash and cash equivalents at beginning of period	5,553	5,192
Cash and cash equivalents at end of period	5,576	5,048
Supplemental Disclosure:
Cash paid for interest	0	0
Cash paid for income taxes	$ 20	$ 5