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Stock-based Compensation (Details 2) - Restricted Stock Unit [Member]
3 Months Ended
Mar. 31, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]  
Balance at beginning | shares 136,245
Granted | shares 6,262
Vested | shares (36,666) [1]
Forfeited | shares
Balance at ending | shares 105,841
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]  
Balance at beginning | $ / shares $ 0.98
Granted | $ / shares 0.854
Vested | $ / shares 0.50
Forfeited | $ / shares
Balance at ending | $ / shares $ 1.26
[1] These shares vested on March 30, 2019 (Saturday) and were issued on Monday, April 1, 2019.