CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING ACTIVITIES
NET INCOME (LOSS)	$ 111	$ (126)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	167	190
Amortization of finite-lived intangible assets	20	14
Gain on disposal of assets		(43)
Stock-based compensation	7	(16)
Deferred income tax benefit	(7)	0
Changes in operating assets and liabilities:
Decrease in accounts receivable, net	318	62
Increase in inventories, net	(412)	(4)
Increase in prepaid expenses and other assets	(95)	(69)
Increase in accounts payable, accrued compensation and commissions expense and other accrued liabilities	110	63
Net cash provided by operating activities	219	71
INVESTING ACTIVITIES
Purchase of marketable securities	(1,002)	0
Capital expenditures	(6)	(48)
Net cash used in investing activities	(1,008)	(48)
(Decrease) increase in cash and cash equivalents	(789)	23
Cash and cash equivalents at beginning of period	2,778	5,553
Cash and cash equivalents at end of period	1,989	5,576
Supplemental Disclosure:
Cash paid for income taxes	$ 18	$ 20