Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 1,478	$ 3,949
Marketable securities	5,121	4,854
Trade accounts receivable, less allowances of $45 and $39, respectively	2,679	2,781
Inventories	3,332	2,219
Prepaid expenses and other current assets	1,041	350
Total current assets	13,651	14,153
Machinery and equipment	6,064	6,036
Leasehold improvements	380	332
Furniture and fixtures	425	400
	6,869	6,768
Less-accumulated depreciation and amortization	(6,552)	(6,434)
Total property and equipment, net	317	334
Capitalized software, net	96	175
Other assets	345	516
Total assets	14,409	15,178
Liabilities
Accounts payable	1,475	777
Deferred revenue	652	375
Accrued liabilities	1,513	1,149
Accrued compensation	231	221
Total current liabilities	3,871	2,522
Deferred lease obligations	16	103
Long term debt	3,500	3,500
Total liabilities	7,387	6,125
Commitments and contingencies
Shareholders' Equity
Common stock, $.10 par value; 100,000,000 shares authorized; 7,011,146 and 7,006,310 shares issued and outstanding, respectively	701	701
Additional paid in capital	46,442	45,730
Accumulated deficit	(39,196)	(36,493)
Cumulative other comprehensive loss	(925)	(885)
Total shareholders' equity	7,022	9,053
Total liabilities and shareholders' equity	$ 14,409	$ 15,178