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SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Schedule of property and equipment estimated useful lives | Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets at the following annual rates:
| %
Computer equipment | 20-33 (mainly 33)
Office furniture and equipment | 6 - 10 (mainly 10)
Machinery and laboratory equipment | 15
Field service units | 50
Leasehold improvements | Over the shorter of the lease term or estimated useful life
Schedule of disaggregation of revenues |
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Units placed |  | $ | 3,620 |  |  | $ | 4,385 |  |  | $ | 6,237 |
Spare parts and warranties |  |  | 773 |  |  |  | 488 |  |  |  | 308 |
Total Revenues |  | $ | 4,393 |  |  | $ | 4,873 |  |  | $ | 6,545
Schedule of trade receivables and short and long term deferred revenues |
|  | December 31, |  |  | December 31, |
|  | 2020 |  |  | 2019 |
Trade receivable, net (1) |  | $ | 684 |  |  | $ | 794 |
Deferred revenues (1) (2) |  | $ | 1,108 |  |  | $ | 844 |
(1) | Balance presented net of unrecognized revenues that were not yet collected.
(2) | $330 thousand of December 31, 2019 deferred revenues balance were recognized as revenues during the year ended December 31, 2020.
Schedule of Black-Scholes-Merton option pricing model assumptions | The fair value for options granted in 2019, 2018 is estimated at the date of grant using a Black-Scholes-Merton option pricing model with the following assumptions:
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |
Expected volatility |  |  | 57.5 | % |  |  | 57% - 61 | %
Risk-free rate |  |  | 2.22 | % |  |  | 2.74% - 2.83 | %
Dividend yield |  |  | — | % |  |  | — | %
Expected term (in years) |  |  | 6.11 |  |  |  | 6.11 |
Share price |  | $ | 5.37 |  |  | $ | 25.5 - $28.75
Schedule of product warranty liability |
|  | US Dollars in thousands |
Balance at December 31, 2019 |  | $ | 227 |
Provision |  |  | 125 |
Usage |  |  | (212 | )
Balance at December 31, 2020 |  |  | 140
Schedule of concentration of credit risk | Concentration of credit risk with respect to trade receivable is primarily limited to a customer to which the Company makes substantial sales.
|  | December 31, |
|  | 2020 |  |  | 2019 |
Customer A |  |  | 15 | % |  |  | * | )
Customer B |  |  | 15 | % |  |  | * | )
Customer C |  |  | 15 | % |  |  | * | )
Customer D |  |  | 14 | % |  |  | * | )
Customer E |  |  | 12 | % |  |  | 12 | %
Customer F |  |  | 11 | % |  |  | * | )
Customer G |  |  | * | ) |  |  | 14 | %
Customer H |  |  | * | ) |  |  | 13 | %
Customer I |  |  | * | ) |  |  | 13 | %
Customer J |  |  | * | ) |  |  | 12 | %
Customer K |  |  | * | ) |  |  | 12 | %
Customer L |  |  | * | ) |  |  | 12 | %
*) | Less than 10%
Schedule of basic and diluted net loss per ordinary share | The following table sets forth the computation of the Company’s basic and diluted net loss per ordinary share (in thousands, except share and per share data):
|  | Year ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Net loss |  | $ | (12,976 | ) |  | $ | (15,551 | ) |  | $ | (21,675 | )
Net loss attributable to ordinary shares |  |  | (12,976 | ) |  |  | (15,551 | ) |  |  | (21,675 | )
Shares used in computing net loss per ordinary shares, basic and diluted |  |  | 15,764,980 |  |  |  | 5,763,317 |  |  |  | 1,472,499 |
Net loss per ordinary share, basic and diluted |  | $ | (0.82 | ) |  | $ | (2.70 | ) |  | $ | (14.72 | )

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