Type	Name	Date
Underwriting agreement	Underwriting Agreement	07/10/2020
Registration rights agreement	Registration Rights Agreement, among the Registrant, Standard General Master Fund L.P., P Standard General Ltd. and Standard General Focus Fund L.P	06/05/2017

Type	Name	Date
By-Laws	Amendment to Bylaws	04/20/2018

Type	Name	Date
Acquisition / asset purchase agreement	Asset Purchase Agreement, between Strategic Diagnostics, Inc. and Romer Labs Technology, Inc	10/22/2012
Acquisition / asset purchase agreement	Asset Purchase Agreement, by and among Strategic Diagnostics Inc., Modern Water Inc., and MW Monitoring IP Limited, a limited liability company incorporated under the laws of England and Wales	11/16/2011