Business Segment, Geographic and Major Customer Information - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Summarized financial information regarding reportable segments
Net revenue from external customers	$ 9,165	$ 8,880	$ 20,935	$ 28,296
Loss from operations, including impairment	(7,461)	(10,231)	(15,704)	(80,316)
Depreciation and amortization	253	468	560	2,659
Additions to long-lived assets	13	0	31	42
Operating Segments | Chemistry Technologies
Summarized financial information regarding reportable segments
Net revenue from external customers	7,688	7,962	17,990	27,378
Loss from operations, including impairment	(3,819)	(3,596)	(7,407)	(66,257)
Depreciation and amortization	233	246	524	2,056
Additions to long-lived assets	13	0	31	42
Operating Segments | Data Analytics
Summarized financial information regarding reportable segments
Net revenue from external customers	1,477	918	2,945	918
Loss from operations, including impairment	(773)	(1,151)	(1,067)	(1,151)
Depreciation and amortization	20	131	35	131
Additions to long-lived assets	0	0	0	0
Corporate and Other
Summarized financial information regarding reportable segments
Net revenue from external customers	0	0	0	0
Loss from operations, including impairment	(2,869)	(5,484)	(7,230)	(12,908)
Depreciation and amortization	0	91	1	472
Additions to long-lived assets	$ 0	$ 0	$ 0	$ 0