Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Depreciation is recorded using the straight-line method over the estimated useful lives of the assets as follows:



Machinery, manufacturing and demonstration equipment	3-5 years
Computer equipment	3 years
Furniture	5 years
Leasehold improvements	Lesser of lease term or 3 to 10 years

The following table presents revenue disaggregated by type and geography:



	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
	(in thousands) (unaudited)
U.S.
Systems	$	—	$	868	$	—	$	1,742
Instruments and accessories	43		426		68		835
Services	99		87		359		137
Total U.S. revenue	142		1,381		427		2,714
Outside of U.S. ("OUS")
Systems	1,277		3,450		5,301		10,686
Instruments and accessories	330		441		1,411		2,653
Services	275		150		705		525
Total OUS revenue	1,882		4,041		7,417		13,864
Total
Systems	1,277		4,318		5,301		12,428
Instruments and accessories	373		867		1,479		3,488
Services	374		237		1,064		662
Total revenue	$	2,024	$	5,422	$	7,844	$	16,578

he details of this adjustment are summarized below.



	Balance at December 31, 2018		Adjustments Due to ASC 842		Balance at January 1, 2019
	(unaudited) (In thousands)
Assets
Other long term assets	$	—	$	1,751	$	1,751
Liabilities and Stockholders' Equity
Accrued expenses	—		507		507
Other long term liabilities	$	—	$	1,244	$	1,244

he following table presents the minimum lease payments as of September 30, 2019 (in thousands):



October 1, 2019 to December 31, 2019	329
January 1, 2020 to December 31, 2020	1,312
January 1, 2021 to December 31, 2021	659
January 1, 2022 to December 31, 2022	398
January 1, 2023 to December 31, 2023	194
January 1, 2024 to December 31, 2024	34
Thereafter	—
Total minimum lease payments	2,926
Less: Amount of lease payments representing interest	(294	)
Present value of future minimum lease payments	2,632