Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Concentration Risk [Line Items]
Amounts Invoiced and Not Collected, After Transition Adjustment	$ 4,511		$ 9,006
Deferred Cost of Sales, After Transition Adjustment	632		1,261
Deferred cost of sales	$ 600		$ 1,300
GPO administrative fees as percent of purchase volume	3.00%
Minimum
Concentration Risk [Line Items]
Typical payment period for customers	30 days
Maximum
Concentration Risk [Line Items]
Typical payment period for customers	60 days
Patents
Concentration Risk [Line Items]
Intangible assets, net of accumulated amortization	$ 100	$ 200