Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,416	$ 9,403
Short-term investments	4,459	947
Accounts receivable	44	31
Inventories	887	915
Prepaid expenses and other current assets	284	103
Total current assets	10,090	11,399
Property and equipment, net	447	457
Total assets	10,537	11,856
Current liabilities:
Accounts payable	196	333
Accrued liabilities	273	455
Total current liabilities	469	788
Commitments and contingencies (Note 9)
Stockholders' equity:
Undesignated stock, $0.01 par value, 10,000,000 shares authorized, no shares issued and outstanding as of March 30, 2013 and December 31, 2012, respectively
Common stock, $0.01 par value, 40,000,000 shares authorized, 26,919,079 and 26,346,079 issued and outstanding as of March 30, 2013 and December 31, 2012, respectively	269	263
Additional paid-in capital	41,106	40,655
Accumulated other comprehensive loss	(1)
Accumulated deficit	(31,306)	(29,850)
Total stockholders' equity	10,068	11,068
Total liabilities and stockholders' equity	$ 10,537	$ 11,856