Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
OPERATING ACTIVITIES
Net loss	$ (574)	$ (2,570)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	607	621
Amortization of finite-lived intangible assets	51	83
Stock-based compensation	201	213
Impairment of note receivable	43	0
Gain on disposal of assets	(67)	0
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable, net	1,065	(245)
Decrease in inventories, net	424	298
Decrease in other assets	42	88
(Decrease) increase in trade accounts payable, accrued compensation and commissions expense, accrued warranty expense and other accrued liabilities	(767)	418
Net cash provided by (used in) operating activities	1,025	(1,094)
INVESTING ACTIVITIES
Capital expenditures	(370)	(164)
Asset acquisition	0	(748)
Other	94	0
Net cash used in investing activities	(276)	(912)
FINANCING ACTIVITIES
Net repayments on note payable to bank	0	(1,181)
Restricted cash	0	1,500
Net cash provided by financing activities	0	319
Increase (decrease) in cash and cash equivalents	749	(1,687)
Cash and cash equivalents at beginning of period	5,192	7,183
Cash and cash equivalents at end of period	5,941	5,496
Supplemental Disclosure:
Cash paid for interest	0	32
Cash paid for income taxes	$ 11	$ 0