Business Segment, Geographic and Major Customer Information - Assets by Reportable Segments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Segment Reporting Information
Total assets	$ 71,418	$ 86,210
Operating Segments | Chemistry Technologies
Segment Reporting Information
Total assets	41,950	43,346
Operating Segments | Data Analytics
Segment Reporting Information
Total assets	5,154	13,201
Corporate and Other
Segment Reporting Information
Total assets	$ 24,314	$ 29,663