Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2018	Jan. 01, 2019	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Instrument warranty term		1 year
Kits and accessories warranty term		60 days
Bundled rental agreement, term (under)		5 years
Deferred revenue and income		$ 217		$ 1,071
Dividend yield (percent)		0.00%
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life		1 year
Payment terms		30 days
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life		7 years
Payment terms		150 days
Diagnostic instruments
Property, Plant and Equipment [Line Items]
Property and equipment, useful life		5 years
ASU 2014-09
Property, Plant and Equipment [Line Items]
Opening retained earnings adjustment	$ 100
Deferred revenue and income	$ 100
Expected | Subsequent Event | ASU 2016-02
Property, Plant and Equipment [Line Items]
Right of use assets			$ 600
Lessee lease liabilities			$ 600