Deferred Revenue, Income and Remaining Performance Obligations (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Deferred revenue and income	$ 291		$ 217
Revenues recognized included in contract liabilities balances	37	$ 37
Revenue expected to be recognized from remaining performance obligations	$ 1,900
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	$ 291		$ 217

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 45
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service.

+ References

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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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