Condensed Consolidated Statements of Cash Flows (unaudited) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (2,229,000)	$ (2,592,000)
Provision for/(recovery of) uncollectible accounts and returns	15,000	(8,000)
Provision for excess and obsolete inventories	101,000	65,000
Depreciation and amortization	170,000	311,000
Stock-based compensation expense	528,000	501,000
Change in assets and liabilities:
Trade accounts receivable	(629,000)	499,000
Inventories	(1,049,000)	(952,000)
Prepaid expenses and other current assets	(359,000)	(11,000)
Other assets	(101,000)	(70,000)
Accounts payable, deferred revenue and accrued liabilities	1,706,000	(516,000)
Accrued compensation	(26,000)	(298,000)
Deferred lease obligations	(65,000)	(57,000)
Net cash used in operating activities	(1,938,000)	(3,128,000)
Cash flows from investing activities:
Purchases of property and equipment	(30,000)	(162,000)
Purchases of capitalized software	(9,000)	(104,000)
Proceeds from the sale of marketable securities	11,007,000	7,213,000
Purchases of marketable securities	(10,439,000)	(7,456,000)
Net cash provided by (used in) investing activities	529,000	(509,000)
Cash flows from financing activities:
Borrowings under credit facility	10,500,000	10,500,000
Payments on credit facility	(10,500,000)	(10,500,000)
Proceeds from the exercise of stock options	26,000	824,000
Net cash provided by financing activities	26,000	824,000
Effect of exchange rate changes on cash and cash equivalents	(4,000)	(2,000)
Net decrease in cash and cash equivalents	(1,387,000)	(2,815,000)
Cash and cash equivalents at beginning of period	3,949,000	7,470,000
Cash and cash equivalents at end of period	$ 2,562,000	$ 4,655,000