Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 16,672	$ 20,218
Accounts receivable, less allowance of $1,378 and $1,583 at September 29, 2013 and December 31, 2012	9,168	9,623
Inventories	10,260	9,547
Other current assets	2,067	4,131
Total current assets	38,167	43,519
Property, plant and equipment, net	3,604	4,669
Other assets, net	491	481
Total assets	42,262	48,669
Current liabilities
Current portion of long-term debt	363	400
Accounts payable	6,416	5,185
Deferred revenue	263	893
Accrued expenses	5,691	5,147
Total current liabilities	12,733	11,625
Long-term debt, less current portion	7,307	7,564
Other long-term liabilities	620
Total liabilities	20,660	19,189
Commitments and contingencies
Stockholders' equity
Preferred stock, $1.00 par value - 5,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.01 par value - 25,000,000 shares authorized; 10,912,831 shares issued and 9,544,864 shares outstanding at September 29, 2013 and 10,898,939 shares issued and 9,530,972 shares outstanding at December 31, 2012	109	109
Additional paid in capital	52,039	51,545
Accumulated deficit	(27,845)	(19,385)
Treasury stock, at cost, 1,367,967 shares at September 29, 2013 and December 31, 2012	(4,990)	(4,990)
Accumulated other comprehensive income	2,289	2,201
Total stockholders' equity	21,602	29,480
Total liabilities and stockholders' equity	$ 42,262	$ 48,669