Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net loss	$ (3,785,000)	$ (505,000)	$ (8,419,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
(Recovery of)/provision for uncollectible accounts and returns	(4,000)	(22,000)	12,000
Provision for excess and obsolete inventories	57,000	60,000	200,000
Depreciation and amortization	377,000	565,000	725,000
Amortization of stock-based compensation	674,000	358,000	324,000
Write-off of impaired capitalized software, property and equipment			29,000
Change in assets and liabilities:
Trade accounts receivable	221,000	1,914,000	204,000
Inventories	(720,000)	29,000	(146,000)
Prepaid expenses and other current assets	66,000	(51,000)	1,715,000
Other assets	(77,000)	312,000	(552,000)
Accounts payable, deferred revenue and accrued liabilities	(120,000)	(1,550,000)	(6,000)
Accrued compensation	(172,000)	(276,000)	(762,000)
Deferred lease obligations	(77,000)	(63,000)	(53,000)
Net cash (used in) provided by operating activities	(3,560,000)	771,000	(6,729,000)
Cash flows from investing activities:
Purchase of property and equipment	(165,000)	(205,000)	(47,000)
Purchase of capitalized software	(127,000)	(93,000)	(30,000)
Proceeds from the sale of marketable securities	10,248,000	7,878,000	6,640,000
Purchases of marketable securities	(10,746,000)	(6,249,000)	(2,950,000)
Net cash (used in) provided by investing activities	(790,000)	1,331,000	3,613,000
Cash flows from financing activities:
Borrowings under credit facility	14,000,000	10,500,000	7,500,000
Payments on credit facility	(14,000,000)	(10,500,000)	(7,500,000)
Proceeds from the exercise of stock options	835,000	527,000
Net cash provided by financing activities	835,000	527,000
Effect of exchange rate changes on cash and cash equivalents	(6,000)	69,000	(227,000)
Net (decrease) increase in cash and cash equivalents	(3,521,000)	2,698,000	(3,343,000)
Cash and cash equivalents at beginning of year	7,470,000	4,772,000	8,115,000
Cash and cash equivalents at end of year	3,949,000	7,470,000	4,772,000
Supplemental Disclosure of Cash Flow Information:
Income taxes paid	10,000	14,000
Interest paid	$ 7,000	$ 30,000	$ 32,000