Deferred Revenue and Remaining Performance Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Deferred revenue and income	$ 250		$ 250		$ 217
Revenues recognized included in contract liabilities balances	200	$ 30	300	$ 65
Revenue expected to be recognized from remaining performance obligations	2,500		$ 2,500
Contact period			These service contracts typically provide for four-year terms and revenue is recognized on a straight-line basis. The balance also includes product shipments for reagent rental, sales-type lease agreements. The agreements have between two and four year terms and revenue is recognized as product is shipped, typically in a straight-line pattern.
Products and services not yet delivered
Disaggregation of Revenue [Line Items]
Deferred revenue and income	$ 250		$ 250		$ 217