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Equity Incentive Plan Outside of 2015 Equity Incentive Plan (Details) - Outside of 2015 Plan [Member]
Mar. 26, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grants in Period | shares 100,000
Grants in Period, Weighted Average Grant Date Fair Value | $ / shares $ 2.51