Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating Activities
Net income (loss)	$ 298	$ (2,530)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	68	102
Gain on disposal of equipment	(13)	(130)
Deferred income taxes	265
Stock based compensation	38	164
Provision for excess and obsolete inventories	(44)	86
Bad debt expense		2
Changes in operating assets and liabilities:
Accounts receivable	316	1,435
Inventories	421	(562)
Prepaid expenses and other current assets	(29)	(14)
Accounts payable	2	86
Deferred revenue	(591)	(38)
Accrued liabilities	42	130
Net cash provided by (used in) operating activities	773	(1,269)
Investing Activities
Purchases of equipment	(68)	(12)
Proceeds from sale of equipment	13	143
Net cash (used in) provided by investing activities	(55)	131
Increase (decrease) in cash	718	(1,138)
Cash - beginning of period	289	1,669
Cash - end of period	$ 1,007	$ 531