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Schedule of Exercise Prices of Common Stock Options (Details) - $ / shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
2016 Stock Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of Shares, Outstanding | 6,902,337 | 8,064,561 | 9,405,541
Number of Shares, Exercisable | 6,027,418 |  |
2016 Stock Incentive Plan [Member] | Exercise Price Range One [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.00 |  |
Number of Shares, Outstanding | 4,825,750 |  |
Number of Shares, Exercisable | 3,982,816 |  |
2016 Stock Incentive Plan [Member] | Exercise Price Range Two [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.25 |  |
Number of Shares, Outstanding | 780,751 |  |
Number of Shares, Exercisable | 779,843 |  |
Exercise price lower range | $ 1.01 |  |
2016 Stock Incentive Plan [Member] | Exercise Price Range Three [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.75 |  |
Number of Shares, Outstanding | 250,000 |  |
Number of Shares, Exercisable | 229,479 |  |
Exercise price lower range | $ 1.51 |  |
2016 Stock Incentive Plan [Member] | Exercise Price Range Four [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 2.00 |  |
Number of Shares, Outstanding | 924,169 |  |
Number of Shares, Exercisable | 913,613 |  |
Exercise price lower range | $ 1.76 |  |
2016 Stock Incentive Plan [Member] | Exercise Price Range Five [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 2.25 |  |
Number of Shares, Outstanding | 121,667 |  |
Number of Shares, Exercisable | 121,667 |  |
Exercise price lower range | $ 2.01 |  |
2019 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of Shares, Outstanding | 82,062,314 | 65,013,645 |
Number of Shares, Exercisable | 13,608,686 |  |
2019 Equity Incentive Plan [Member] | Exercise Price Range One [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of Shares, Outstanding | 250,000 |  |
Number of Shares, Exercisable | 250,000 |  |
2019 Equity Incentive Plan [Member] | Exercise Price Range Two [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.00 |  |
Number of Shares, Outstanding | 81,812,314 |  |
Number of Shares, Exercisable | 13,358,686 |  |
Stock Options Outside 2016 Plan and 2019 Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.00 |  |
Number of Shares, Outstanding | 3,052,000 | 3,724,667 | 2,414,000
Number of Shares, Exercisable | 2,376,333 |  |
Publisher Partner Warrant [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of Shares, Outstanding | 789,541 |  |
Number of Shares, Exercisable | 463,041 |  |
Publisher Partner Warrant [Member] | Exercise Price Range One [Member] | Black-Scholes Option Pricing Model [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.00 |  |
Number of Shares, Outstanding | 40,000 |  |
Number of Shares, Exercisable | 40,000 |  |
Publisher Partner Warrant [Member] | Exercise Price Range Two [Member] | Black-Scholes Option Pricing Model [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.25 |  |
Number of Shares, Outstanding | 465,419 |  |
Number of Shares, Exercisable | 275,419 |  |
Exercise price lower range | $ 1.01 |  |
Publisher Partner Warrant [Member] | Exercise Price Range Three [Member] | Black-Scholes Option Pricing Model [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.50 |  |
Number of Shares, Outstanding | 68,277 |  |
Number of Shares, Exercisable | 68,277 |  |
Exercise price lower range | $ 1.26 |  |
Publisher Partner Warrant [Member] | Exercise Price Range Four [Member] | Black-Scholes Option Pricing Model [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 1.75 |  |
Number of Shares, Outstanding | 110,318 |  |
Number of Shares, Exercisable | 27,818 |  |
Exercise price lower range | $ 1.51 |  |
Publisher Partner Warrant [Member] | Exercise Price Range Five [Member] | Black-Scholes Option Pricing Model [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 2.00 |  |
Number of Shares, Outstanding | 104,449 |  |
Number of Shares, Exercisable | 50,449 |  |
Exercise price lower range | $ 1.76 |  |
Publisher Partner Warrant [Member] | Exercise Price Range Six [Member] | Black-Scholes Option Pricing Model [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price upper range | $ 2.25 |  |
Number of Shares, Outstanding | 1,078 |  |
Number of Shares, Exercisable | 1,078 |  |
Exercise price lower range | $ 2.01 |  |

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