Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition and Contracts with Customers - Additional Information (Details)

v3.20.1
Revenue Recognition and Contracts with Customers - Additional Information (Details)
3 Months Ended
Mar. 31, 2020
USD ($)
Standard Product Warranty Term 12 months
Revenue, Remaining Performance Obligation $ 695,000
Revenue, Performance Obligation, Total Transaction Price 855,000
Expects to Recognize Sales in Existing Remaining Performance Obligation $ 695,000
Extended Warranties [Member]  
Standard Product Warranty Term 12 months
Revenue, Remaining Performance Obligation $ 86,000
OEM Product and Waveguide Sales [Member]  
Standard Product Warranty Term 18 months