Accrued Expenses - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Jan. 03, 2015
Components of accrued expenses
Customer deposits	$ 336	$ 500
Earn-out – short term	370	382
Distributor commission	234	300
Sales and use tax payable	105	107
Royalties payable	52	36
Other accrued expenses	625	445
Total accrued expenses	$ 1,722	$ 1,770