Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Schedule of disaggregation of revenues

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Units placed	$	1,104	$	1,544	$	3,350	$	4,744
Spare parts and warranties		130		73		342		222
Total Revenues	$	1,234	$	1,617	$	3,692	$	4,966

Schedule of Contract balances

	September 30,		December 31,
	2019		2018
Trade receivable, net (1)	$	572	$	758
Deferred revenues (1) (2)	$	848	$	668

(1) Balance presented net of unrecognized revenues that were not yet collected.

(2) $223 thousand of December 31, 2018 deferred revenues balance were recognized as revenues during the nine months ended September 30, 2019.

Revenue expected to be recognized in any future year related to remaining performance obligations, excluding revenue pertaining to contracts that have an original expected duration of one year or less, contracts where revenue is recognized as invoiced and contracts with variable consideration related to undelivered performance obligations, is not material.

The Company's unfilled performance obligations as of September 30, 2019 and the estimated revenue expected to be recognized in the future related to the service type warranty amounts to $893 thousand, which is fulfilled over one to five years.

Schedule of concentration of credit risk

	September 30,			December 31,
	2019			2018
Customer A		19	%		*	)
Customer B		18	%		*	)
Customer C		18	%		*	)
Customer D		16	%		*	)
Customer E		14	%		*	)
Customer F		*	)		29	%
Customer G		*	)		15	%
Customer H		*	)		14	%
Customer I		*	)		13	%
Customer J		*	)		12	%

*) Less than 10%

Schedule of product warranty liability

	US Dollars in thousands
Balance at December 31, 2018	$	304
Provision		142
Usage		(201	)
Balance at September 30, 2019	$	245