Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
2011 Equity Incentive Plan [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)	14,000
Exercise price per unit	$ 0.01
Fair value of stock options granted	$ 62
Stock option plan, expiration date	Apr. 05, 2028
2011 Non-Employee Directors Stock Option Plan [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)	25,000
Exercise price per unit	$ 1.78
Fair value of stock options granted	$ 10
23 senior officers, staff members and consultants [Member] | 2011 Equity Incentive Plan [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)	330,000
Exercise price per unit	$ 0.01
Fair value of stock options granted	$ 759
Stock option plan, expiration date	Jan. 01, 2028
23 senior officers, staff members and consultants [Member] | 2011 Equity Incentive Plan [Member] | June 30, 2018 [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)		165,000
23 senior officers, staff members and consultants [Member] | 2011 Equity Incentive Plan [Member] | December 31, 2018 [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)			165,000
Five senior officers [Member] | 2011 Equity Incentive Plan [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)	110,000
Exercise price per unit	$ 0.01
Fair value of stock options granted	$ 250
Stock option plan, expiration date	Jan. 04, 2028
Three consultants [Member] | 2011 Equity Incentive Plan [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)	55,000
Exercise price per unit	$ 0.01
Fair value of stock options granted	$ 222
Stock option vested, description	The options vested upon grant. However, the exercisability of these options is according to the following schedule: (a) 27,500 options are exercisable on June 30, 2018 and (b) the remaining 27,500 options are exercisable on June 30, 2019.
Eight Board Members [Member] | 2011 Non-Employee Directors Stock Option Plan [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)	400,000
Exercise price per unit	$ 2.31
Fair value of stock options granted	$ 428
Stock option plan, expiration date	Jan. 01, 2024
One Senior Officer [Member] | 2011 Equity Incentive Plan [Member]
Stockholders' Equity (Textual)
Shares purchased under option plan (in share)	100,000
Exercise price per unit	$ 0.01
Fair value of stock options granted	$ 55
Stock option plan, expiration date	May 01, 2029
Stock option vested, description	However, the vesting and exercisability of these options is subject to the following schedule: (a) 50,000 options vest on September 1, 2019 and (b) the remaining 50,000 options vest on January 1, 2020.
Senior Officer One [Member] | 2011 Equity Incentive Plan [Member] | June 30, 2018 [Member]
Stockholders' Equity (Textual)
Exercise price per unit	$ 0.01
Fair value of stock options granted		$ 10,000
Stock option plan, expiration date		Jun. 01, 2029