Business Segments and Geographical Information - Revenue Information by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 46,158	$ 41,757	$ 42,814
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	25,171	23,952	22,590
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	9,567	7,968	9,096
Rest of Americas
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	2,800	2,676	3,199
Asia/Pacific Rim
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 8,620	$ 7,161	$ 7,929