Condensed Consolidated Statements of Cash Flows (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net loss	$ (1,016,000)	$ (1,410,000)
Allowance for/(recovery of) doubtful accounts and returns	14,000	(1,000)
Writedowns of excess and obsolete inventories	14,000	16,000
Depreciation and amortization	58,000	57,000
Amortization of stock-based compensation	123,000	205,000
Loss on retirement of machinery and equipment	14,000
Change in assets and liabilities:
Trade accounts receivable	293,000	173,000
Inventories	(251,000)	131,000
Prepaid expenses and other current assets	(597,000)	(204,000)
Other assets	(54,000)	(3,000)
Accounts payable, deferred revenue and accrued liabilities	123,000	665,000
Accrued compensation	(58,000)	(67,000)
Deferred lease obligations	568,000	(21,000)
Net cash used in operating activities	(769,000)	(459,000)
Cash flows from investing activities:
Purchases of property and equipment	(646,000)	(15,000)
Purchases of capitalized software	(1,000)
Proceeds from the sale of marketable securities	4,514,000	3,830,000
Purchases of marketable securities	(4,010,000)	(3,507,000)
Net cash (used in) provided by investing activities	(143,000)	308,000
Cash flows from financing activities:
Borrowings under credit facility	3,500,000	3,500,000
Payments on credit facility	(3,500,000)	(3,500,000)
Net cash provided by (used in) financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	(1,000)	(7,000)
Net decrease in cash and cash equivalents	(913,000)	(158,000)
Cash and cash equivalents at beginning of period	1,478,000	3,949,000
Cash and cash equivalents at end of period	$ 565,000	$ 3,791,000