Condensed Consolidated Statements of Cash Flows (unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (2,305,000)	$ (2,051,000)
Provision for/(recovery of) uncollectible accounts and returns	9,000	(2,000)
Provision for excess and obsolete inventories	80,000	20,000
Depreciation and amortization	116,000	224,000
Stock-based compensation expense	371,000	331,000
Change in assets and liabilities:
Trade accounts receivable	(407,000)	211,000
Inventories	(290,000)	(870,000)
Prepaid expenses and other current assets	(456,000)	1,000
Other assets	(12,000)	(29,000)
Accounts payable, deferred revenue and accrued liabilities	1,391,000	(1,000)
Accrued compensation	82,000	(51,000)
Deferred lease obligations	(43,000)	(37,000)
Net cash used in operating activities	(1,464,000)	(2,254,000)
Cash flows from investing activities:
Purchases of property and equipment	(21,000)	(157,000)
Purchases of capitalized software		(72,000)
Proceeds from the sale of marketable securities	7,678,000	4,180,000
Purchases of marketable securities	(6,862,000)	(4,756,000)
Net cash provided by (used in) investing activities	795,000	(805,000)
Cash flows from financing activities:
Borrowings under credit facility	7,000,000	7,000,000
Payments on credit facility	(7,000,000)	(7,000,000)
Proceeds from the exercise of stock options		821,000
Net cash provided by financing activities		821,000
Effect of exchange rate changes on cash and cash equivalents	(4,000)	(2,000)
Net decrease in cash and cash equivalents	(673,000)	(2,240,000)
Cash and cash equivalents at beginning of period	3,949,000	7,470,000
Cash and cash equivalents at end of period	$ 3,276,000	$ 5,230,000