Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 565	$ 1,478
Marketable securities	4,617	5,121
Trade accounts receivable, less allowances of $60 and $45, respectively	2,372	2,679
Inventories	3,569	3,332
Prepaid expenses and other current assets	1,637	1,041
Total current assets	12,760	13,651
Machinery and equipment	6,085	6,064
Leasehold improvements	616	380
Furniture and fixtures	152	425
	6,853	6,869
Less-accumulated depreciation and amortization	(5,940)	(6,552)
Total property and equipment, net	913	317
Capitalized software, net	75	96
Other assets	399	345
Total assets	14,147	14,409
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	1,409	1,475
Deferred revenue	638	652
Accrued liabilities	1,715	1,513
Accrued compensation	173	231
Total current liabilities	3,935	3,871
Deferred lease obligations	584	16
Long-term debt	3,500	3,500
Total liabilities	8,019	7,387
Commitments and Contingencies
Shareholders’ Equity
Common stock, $0.10 par value; 100,000,000 shares authorized; 7,011,146 and 7,011,146 shares issued and outstanding, respectively	701	701
Additional paid in capital	46,565	46,442
Accumulated deficit	(40,212)	(39,196)
Cumulative other comprehensive loss	(926)	(925)
Total shareholders' equity	6,128	7,022
Total liabilities and shareholders' equity	$ 14,147	$ 14,409