Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net loss	$ (2,703,000)	$ (3,785,000)	$ (505,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Allowance for/(recovery of) doubtful accounts and returns	19,000	(4,000)	(22,000)
Writedowns of excess and obsolete inventories	120,000	57,000	60,000
Depreciation and amortization	221,000	377,000	565,000
Amortization of stock-based compensation	686,000	674,000	358,000
Loss on retirement of machinery and equipment	8,000
Change in assets and liabilities:
Trade accounts receivable	83,000	221,000	1,914,000
Inventories	(1,233,000)	(720,000)	29,000
Prepaid expenses and other current assets	(677,000)	66,000	(51,000)
Other assets	174,000	(77,000)	312,000
Accounts payable, deferred revenue and accrued liabilities	1,294,000	(120,000)	(1,550,000)
Accrued compensation	10,000	(172,000)	(276,000)
Deferred lease obligations	(87,000)	(77,000)	(63,000)
Net cash (used in) provided by operating activities	(2,085,000)	(3,560,000)	771,000
Cash flows from investing activities:
Purchase of property and equipment	(120,000)	(165,000)	(205,000)
Purchase of capitalized software	(14,000)	(127,000)	(93,000)
Proceeds from the sale of marketable securities	14,670,000	10,248,000	7,878,000
Purchases of marketable securities	(14,938,000)	(10,746,000)	(6,249,000)
Net cash (used in) provided by investing activities	(402,000)	(790,000)	1,331,000
Cash flows from financing activities:
Borrowings under credit facility	14,000,000	14,000,000	10,500,000
Payments on credit facility	(14,000,000)	(14,000,000)	(10,500,000)
Proceeds from the exercise of stock options	26,000	835,000	527,000
Net cash provided by financing activities	26,000	835,000	527,000
Effect of exchange rate changes on cash and cash equivalents	(10,000)	(6,000)	69,000
Net (decrease) increase in cash and cash equivalents	(2,471,000)	(3,521,000)	2,698,000
Cash and cash equivalents at beginning of year	3,949,000	7,470,000	4,772,000
Cash and cash equivalents at end of year	1,478,000	3,949,000	7,470,000
Supplemental Disclosure of Cash Flow Information:
Income taxes paid	12,000	10,000	14,000
Interest paid	$ 7,000	$ 7,000	$ 30,000