Business Segment, Geographic and Major Customer Information - Assets by Reportable Segments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Segment Reporting Information
Total assets	$ 78,717	$ 86,210
Operating Segments | Chemistry Technologies
Segment Reporting Information
Total assets	33,804	43,346
Operating Segments | Data Analytics
Segment Reporting Information
Total assets	14,025	13,201
Corporate and Other
Segment Reporting Information
Total assets	$ 30,888	$ 29,663