Quarterly report pursuant to Section 13 or 15(d)

Stock Options - Schedule of Stock Option Activity (Details) (Parenthetical)

v3.21.2
Stock Options - Schedule of Stock Option Activity (Details) (Parenthetical) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jul. 29, 2020
Jul. 29, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Number of Options, Granted [1]       2,523,427
Exercise price of option     $ 0.026   $ 0.016
Stock-based compensation expense     $ 235 $ 832  
General and Administrative Expense [Member]          
Stock-based compensation expense     146   $ 349
Two Officers [Member]          
Number of Options, Granted 2,523,427        
Exercise price of option $ 0.095 $ 0.095      
Option vested period 5 years        
Fair value of stock options, value $ 206        
Expected dividend yield 0.00%        
Risk-free interest rate 0.25%        
Expected volatility 131.90%        
Two Officers [Member] | General and Administrative Expense [Member]          
Fair value of stock options, value $ 275        
Stock-based compensation expense     $ 23   $ 331
Restricted Stock [Member]          
Option vested period 3 years        
Stock-based compensation expense $ 900        
Restricted Stock [Member] | Public Offering [Member]          
Number of shares issued   30,000,000      
[1] On July 29, 2020 (the "Commitment Date"), the Company held its Annual General Meeting of Shareholders, at which the shareholders of the Company approved compensation packages for two officers that include inter alia the Company is obligated to grant of 2,545,083 stock options which are exercisable into the same number of shares of common stock at an exercise price of $0.095 per share and shall become vested quarterly over a 5-year period from its grant date. At the Commitment Date, the Company by assistance of third-party appraiser measured the fair value of the stock options in total amount of $206 by using Black-Scholes-Merton pricing model in which the assumptions that have been used are as follows: expected dividend yield of 0%; risk-free interest rate of 0.25%; expected volatility of 131.9%, and stock options exercise period based upon the stated terms. In addition, as one-time bonus as compensation for uncompensated efforts to the Commitment Date, the Company is obligated to grant fully vested shares equal to $275 based on the fair market value of the Company's shares as of July 28, 2020. The Company recorded stock-based compensation expense of this amount as part of "General and Administrative Expenses" line in operations in the accompanying consolidated statement of operations during the year ended December 31, 2020. Moreover, upon consummation of the Company's planned public offering, 30,000,000 restricted stock units' bonuses will be granted to the aforesaid officers. At the Commitment Date, December 31, 2020 and March 31, 2021, the likelihood that the Performance Milestone for consummation of the Company's planned public offering was not considered as probable. Thus, during the year ended December 31, 2020 and the period of three months ended March 31, 2021, stock-based compensation expense has not been recorded with respect to the Performance Milestone. During the year ended December 31, 2020 and the period of three months ended March 31, 2021, the Company recorded stock-based compensation expense amounting to $331 and $23, respectively, as part of "General and Administrative Expenses" line in operations in the accompanying consolidated statement of operations.