Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies - Schedule of Basic and Diluted Loss Per Share (Details)

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Organization and Summary of Significant Accounting Policies - Schedule of Basic and Diluted Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Net loss $ (7,029) $ (4,797)
Deemed dividend and accretion of a discount, basic calculation (9,565) (2,703)
Net loss attributable to common stockholders, basic calculation $ (16,594) $ (7,500)
Number of shares used in per common share calculations: basic calculation 16,406,556 1,555,988
Net loss, basic calculation $ (0.43) $ (3.08)
Deemed dividend and accretion of a discount, basic calculation (0.58) (1.74)
Net loss attributable to common stockholders, basic calculation $ (1.01) $ (4.82)
Net loss, effect of dilutive warrant securities $ (2,293) $ (1,346)
Deemed dividend and accretion of a discount, effect of dilutive warrant securities
Net loss attributable to common stockholders, effect of dilutive warrant securities $ (2,293) $ (1,346)
Number of shares used in per common share calculations: effect of dilutive warrant securities 1,039,592
Net income, effect of dilutive warrant securities $ (0.10) $ (0.87)
Deemed dividend and accretion of a discount, effect of dilutive warrant securities 0.03
Net loss attributable to common stockholders, effect of dilutive warrant securities $ (0.07) $ (0.87)
Net loss, diluted calculation $ (9,323) $ (6,143)
Deemed dividend and accretion of a discount, diluted calculation (9,565) (2,703)
Net loss attributable to common stockholders, diluted calculation $ (18,888) $ (8,846)
Number of shares used in per common share calculations: diluted calculation 17,446,148 1,555,988
Net income (loss), diluted calculation $ (0.53) $ (3.95)
Deemed dividend and accretion of a discount, diluted calculation (0.55) (1.74)
Net loss attributable to common stockholders, diluted calculation $ (1.08) $ (5.69)