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Stock-based Compensation (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Jul. 12, 2018
Mar. 31, 2019
Dec. 31, 2018
Share price   $ 1.22 $ 0.59
Weighted average grant date fair value of options granted   $ 0.854  
Equity Incentive Plan 2018 [Member]      
Number of shares authorized 1,000,000    
Number of additional shares authorized 2,874,280    
Common stock capital shares reserved for future issuance   1,874,589  
Equity Incentive Plan 2018 [Member] | Stock Option [Member] | Maximum [Member]      
Vesting period   36 months  
Equity Incentive Plan 2018 [Member] | Stock Option [Member] | Minimum [Member]      
Vesting period   2 months  
Stock Option Plan 2008-2009 [Member]      
Compensation cost not yet recognized   $ 335  
Unvested options weighted average period   24 months