Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition and Contracts with Customers (Additional Information (Detail)

v3.10.0.1
Revenue Recognition and Contracts with Customers (Additional Information (Detail) - USD ($)
9 Months Ended
Jan. 02, 2018
Sep. 30, 2018
Cumulative Effect on Retained Earnings, Net of Tax $ 81,724 $ 81,724
Revenue, Remaining Performance Obligation   228,000
Waveguide Sales [Member]    
Revenue, Remaining Performance Obligation   $ 141,000