Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net loss	$ (2,144,000)	$ (2,305,000)
Allowance for doubtful accounts and returns	17,000	9,000
Writedowns of excess and obsolete inventories	14,000	80,000
Depreciation and amortization	142,000	116,000
Amortization of stock-based compensation	241,000	371,000
Loss on retirement of machinery and equipment	14,000
Change in assets and liabilities:
Trade accounts receivable	(330,000)	(407,000)
Inventories	(201,000)	(290,000)
Prepaid expenses and other current assets	23,000	(456,000)
Other assets	(22,000)	(12,000)
Accounts payable, deferred revenue and accrued liabilities	265,000	1,391,000
Accrued compensation	83,000	82,000
Deferred lease obligations	1,308,000	(43,000)
Net cash used in operating activities	(590,000)	(1,464,000)
Cash flows from investing activities:
Purchases of property and equipment	(1,520,000)	(21,000)
Purchases of capitalized software	(10,000)
Proceeds from the sale of marketable securities	8,565,000	7,678,000
Purchases of marketable securities	(7,410,000)	(6,862,000)
Net cash (used in) provided by investing activities	(375,000)	795,000
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	3,000
Net cash provided by financing activities	3,000	0
Effect of exchange rate changes on cash and cash equivalents	(1,000)	(4,000)
Net decrease in cash and cash equivalents	(963,000)	(673,000)
Cash and cash equivalents at beginning of period	1,478,000	3,949,000
Cash and cash equivalents at end of period	$ 515,000	$ 3,276,000