Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Components of accrued expenses
Income taxes payable	$ 0	$ 210
Sales and use tax payable	49	94
Distributor commission	173	274
Customer deposits	158	117
Royalties payable	32	126
Earn-out-short term	156	197
Other accrued expenses	674	902
Total accrued expenses	$ 1,242	$ 1,920