Leasehold Improvements and Equipment (Details) - USD ($)	Oct. 03, 2015	Jan. 03, 2015
Leasehold improvements and equipment
Laboratory equipment	$ 3,577,132	$ 3,151,748
Leasehold improvements	513,453	495,240
Computer equipment	379,806	329,737
Furniture and fixtures	15,678	13,039
Office equipment	21,547	7,877
Construction in progress	21,561	68,141
Leasehold improvements and equipment, gross	4,529,177	4,065,782
Less accumulated depreciation	2,947,216	2,801,122
Leasehold improvements and equipment, total	$ 1,581,961	$ 1,264,660