Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 515	$ 1,478
Marketable securities	3,966	5,121
Trade accounts receivable, less allowances of $62 and $45, respectively	2,992	2,679
Inventories	3,519	3,332
Prepaid expenses and other current assets	1,014	1,041
Total current assets	12,006	13,651
Machinery and equipment	6,983	6,064
Leasehold improvements	587	380
Furniture and fixtures	152	425
	7,722	6,869
Less-accumulated depreciation and amortization	(5,997)	(6,552)
Total property and equipment, net	1,725	317
Capitalized software, net	62	96
Other assets	367	345
Total assets	14,160	14,409
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	1,589	1,475
Deferred revenue	656	652
Accrued liabilities	1,651	1,513
Accrued compensation	314	231
Total current liabilities	4,210	3,871
Deferred lease obligations	1,324	16
Long-term debt	3,500	3,500
Total liabilities	9,034	7,387
Commitments and Contingencies
Common stock, $0.10 par value; 100,000,000 shares authorized; 7,011,771 and 7,011,146 shares issued and outstanding, respectively	701	701
Additional paid in capital	46,686	46,442
Accumulated deficit	(41,340)	(39,196)
Cumulative other comprehensive loss	(921)	(925)
Total shareholders' equity	5,126	7,022
Total liabilities and shareholders' equity	$ 14,160	$ 14,409