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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Intangible Assets and Goodwill

The changes in the carrying amounts of finite-life intangible assets and goodwill for the years ended December 31, 2018 and 2017 are as follows (in thousands):

		December 31, 2018				December 31, 2017
Intangibles, net:
Beginning balance		$	7,207			$	8,447
Increase			—				—
Amortization			(1,250	)			(1,240	)
Ending balance			5,957				7,207
Goodwill, net:
Beginning balance			3,922				3,922
Increase (decrease)			—				—
Ending balance			3,922				3,922
Total goodwill and other intangibles, net		$	9,879			$	11,129

Schedule of Estimated Fair Value Determined Using Option Pricing Model Assumptions

The warrants are not traded in an active securities market, and as such the estimated the fair value as of December 31, 2018 was determined by using an option pricing model with the following assumptions:

		As of December 31, 2018				As of July 25, 2018 (inception date)
Expected term		2.1 years				2.5 years
Common stock market price		$	0.29		$	0.72
Risk-free interest rate			2.48%			2.70%
Expected volatility			125%			112%
Resulting fair value (per warrant)		$	0.13		$	0.45

Revenue by Product

The following table represents revenue by product (in thousands):

		Years ended December 31,
		2018				2017
Consumable		$	2,169			$	1,918
Device			225				576
Other products			277				195
		$	2,671			$	2,689

Product Revenues, Classified by Geographic Location

Product revenues, classified by geographic location, are as follows (in thousands):

		Years ended December 31,
		2018								2017
		Product Revenues				% of Total				Product Revenues				% of Total
Americas		$	293				11	%		$	345				13	%
Japan			2,058				77	%			1,924				71	%
EMEA			270				10	%			344				13	%
Asia Pacific			50				2	%			76				3	%
Total product revenues		$	2,671				100	%		$	2,689				100	%

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Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique used to measure similar asset in prior period by class of asset or liability on non-recurring basis.

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