Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Current assets:
Cash and cash equivalents	$ 13,444	$ 11,901
Accounts receivable, net of allowance for doubtful accounts of $207 in 2013 and $146 in 2012	7,345	5,480
Inventories	10,605	8,035
Prepaid expenses and other current assets	576	1,129
Current assets of discontinued operations		510
Total current assets	31,970	27,055
Property and equipment, net	543	483
Other intangible assets, net	328	554
Goodwill	533	533
Other long-term assets	303	287
Total assets	33,677	28,912
Current liabilities:
Accounts payable	2,278	2,105
Accrued compensation	1,891	1,563
Accrued expenses	1,592	1,242
Accrued warranty	468	453
Deferred revenue	1,133	1,004
Total current liabilities	7,362	6,367
Long-term liabilities:
Other long-term liabilities	461	640
Total liabilities	7,823	7,007
Commitments and contingencies (Note 10)
Stockholders’ equity:
Convertible preferred stock, $0.01 par value: Authorized: 2,000,000 shares; Issued and outstanding: 0 and 500,000 shares in 2013 and 2012, respectively; Liquidation preference of $5,000 in 2012		5
Common stock, $0.01 par value: Authorized: 30,000,000 shares; Issued and outstanding: 9,899,483 shares in 2013 and 8,452,971 shares in 2012	104	94
Additional paid-in capital	40,671	38,958
Accumulated deficit	(14,921)	(17,152)
Total stockholders’ equity	25,854	21,905
Total liabilities and stockholders’ equity	$ 33,677	$ 28,912