Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit): (Tables)

9 Months Ended

Sep. 30, 2018

Stockholders' Equity Note [Abstract]

Schedule of key underlying assumptions

The following are the key underlying assumptions that were used: 

	December 31, 2017		January 24, 2018		August 30, 2018		September 24, 2018
Dividend yield (%)		0		0		0		0
Expected volatility (%)		36.9		37.9		37.3		36.4
Risk free interest rate (%)		1.74		1.75		2.15		2.21
Strike price		1.00		1.00		1.00		1.00
Series B Preferred Stock price		1.13		1.10		0.44		0.38
Probability of if-converted scenario (%)		90		90		90		90
Probability assumed liquidation scenario (%)		10		10		10		10
Expected term of Option (years)		1.0		0.9		0.33		0.25
Option’s fair value per share	$	0.33	$	0.30	$	0.04	$	0.04

Schedule of reflects the components of the option to purchase redeemable convertible B preferred stock

The following tabular presentation reflects the activity in the Option to purchase Series B Shares during the nine months ended September 30, 2018 - 

	Fair value of Option to purchase Series B Shares
	(Unaudited)
Opening balance, January 1, 2018	$	4,390
Partial exercise of Series B Shares written call option		(681	)
Revaluation of option to purchase Series B Shares		(3,288	)
Extinguishment of option to purchase Series B Shares (*)		(421	)
Closing balance, September 30, 2018	$	—

(*) On September 24, 2018, the OFI Purchase Agreement was superseded by the Remediation Agreement entered into with OFI and Note Holders. Consequently, the option to purchase Series B Shares has been extinguished, as described below in more details.

Activity in the account redeemable convertible preferred stock Series B for the nine months ended September 30, 2018, is outlined in the below table - 

	September 30, 2018
	(Unaudited)
Opening balance, January 1, 2018	$	87
Proceeds from issuance of Series B Shares at the Second Date and Third Date		2,325
Accretion of Series B Shares to redemption value		2,001
Partial exercise of Series B Shares written call option at the Second Date and Third Date		681
Conversion of Series B Shares into Common Stock (*)		(2,553	)
Dividend on Series B Shares		177
Cancellation of Series B Shares in exchange for Series D Preferred Stock (**)		(2,718	)
Closing balance, September 30, 2018	$	—

(*) Under the OFI Purchase Agreement, the Series B Preferred Stock, up to the stated limits, would automatically convert to the Company’s common stock on May 31, 2018. Consequently, 1,869,663 shares of Series B Preferred Stock held by OFI would have been converted into 2,965,301 shares, or 19.99% of the then 11,868,619 outstanding shares of common stock as of May 31, 2018, which is the applicable conversion date under the OFI Purchase Agreement. The then remaining 1,855,337 unconverted shares of the Series B Preferred Stock remained as mezzanine and accrued a preferred dividend until September 24, 2018, when the Series B shares were withdrawn and Series D preferred shares were issued in replacement, as described below in more details.

(**) On September 24, 2018, the OFI Purchase Agreement was superseded by the Remediation Agreement entered into with OFI and Note Holders. Consequently, the Series B Shares have been withdrawn and Series D Shares were issued in replacement, as described below in more details.

Schedule of stock options

A summary of stock option transactions under these plans during the nine months ended September 30, 2018 are as follows: 

	Number of Stock Options			Weighted Average Exercise Price		Weighted Average Remaining Term (in years)		Aggregate Intrinsic Value (*)
Outstanding at January 1, 2018		79,890		$	94.51		3.6	$	—
Granted		147,088		$	0.98		9.5	$	—
Exercised		—			—		—		—
Expired/cancelled		(149,588	)		—		—		—
Outstanding at September 30, 2018		77,390		$	95.27		3.6	$	—
Exercisable at September 30, 2018		77,390		$	95.27		3.6	$	—

(*) The aggregate intrinsic value represents the total intrinsic value (the difference between the deemed fair value of the Company’s Ordinary Shares on the last day of the third quarter of 2018 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on September 30, 2018. This amount is impacted by the changes in the fair value of the Company’s shares.