Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Details 1) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Opening balance				$ (3,618)
Partial exercise of Series B Preferred Stock written call option				681
Revaluation of option to purchase Series B Shares	[1]	$ 33		2,001
Closing balance		568		568
Redeemable Convertible Preferred Stock Series B [Member]
Opening balance				4,390
Partial exercise of Series B Preferred Stock written call option				(681)
Revaluation of option to purchase Series B Shares				3,288
Extinguishment of option to purchase Series B Shares	[2]			(421)
Closing balance

[1] Based on the rights and privileges of Series B Preferred Stock, since the Company did not obtain shareholder approval at March 31, 2018, the then outstanding Series B Preferred Stock became redeemable at the option of OFI. Consequently, in each reporting period commencing March 31, 2018, the outstanding Series B Preferred Stock is recorded at its maximum redemption value until occurrence of redemption or conversion. These shares were cancelled as a result of the entry into the Remediation Agreement on September 24, 2018 as described below (see also Note 5).

[2] On September 24, 2018, the OFI Purchase Agreement was superseded by the Remediation Agreement entered into with OFI and Note Holders.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.