Leasehold Improvements and Equipment (Details) - USD ($)	Jul. 04, 2015	Jan. 03, 2015
Leasehold improvements and equipment
Laboratory equipment	$ 3,530,714	$ 3,151,748
Leasehold improvements	503,343	495,240
Computer equipment	347,786	329,737
Furniture and fixtures	13,039	13,039
Office equipment	21,547	7,877
Construction in progress	18,948	68,141
Leasehold improvements and equipment, gross	4,435,377	4,065,782
Less accumulated depreciation	2,883,127	2,801,122
Leasehold improvements and equipment, total	$ 1,552,250	$ 1,264,660