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

12 Months Ended

Dec. 31, 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 fair value of option to purchase series B shares

 The following tabular presentation reflects the activity in the fair value of Option to purchase Series B Shares during the years ended December 31, 2018 and 2017-

		For the year ended December 31,
		2018			2017
Opening balance, January 1		$	4,390		$	—
Recognition of written call Option as a discount of Series B Shares			—			1,500
Partial exercise of Series B Shares written call option			(681	)		—
Revaluation of option to purchase Series B Shares			(3,288	)		3,018
Extinguishment of option to purchase Series B Shares (*)			(421	)		—
Closing balance, December 31		$	—		$	4,390
(*)	On September 24, 2018, the OFI Purchase Agreement was superseded by the Remediation Agreement entered into with OFI and Note Holders.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.

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

Activity in the account redeemable convertible preferred stock Series B for the year ended December 31, 2018, is outlined in the below table -

	December 31,
	2018			2017
Opening balance, January 1	$	87		$	—
Proceeds from issuance of Series B Shares		2,325			1,500
Recognition of written call Option as a discount of Series B Shares		—			(1,500	)
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	)		—
Amortization of discount		—			84
Dividend on Series B Shares		177			3
Cancellation of Series B Shares in exchange for Series D Preferred Stock (**)		(2,718	)		—
Closing balance, December 31	$	—		$	87

(*) 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 have been recorded as 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 the plans during the years ended December 31, 2018 and 2017 are as follows:

	Number of Stock Options			Weighted Average Exercise Price			Weighted Average Remaining Term (in years)		Aggregate Intrinsic Value (*)
									$
Outstanding at January 1, 2017		134,150		$	85.22			4.3		—
Granted		—			—			—		—
Exercised		—			—			—		—
Expired/cancelled		(54,260	)		(91.43	)		—		—
Outstanding at December 31, 2017		79,890			94.51			3.3		—
Granted		147,088			0.98			9.5		—
Exercised		—			—			—		—
Expired/cancelled		(149,588	)		(0.98	)		—		—
Outstanding at December 31, 2018		77,390		$	95.27			3.3	$	—
Exercisable at December 31, 2018		77,390		$	95.27			3.3	$	—

(*) 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 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 December 31, 2018. This amount is impacted by the changes in the fair value of the Company’s shares.