Summary of Significant Accounting Policies - Schedule of Available-for-sale Securities (Details) (10-K) - USD ($) |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Unrealized Losses | $ (923) | $ 923 | ||
| Corporate Debt Securities [Member] | ||||
| Amortized Cost | 4,010,003 | |||
| Unrealized Gains | 27 | |||
| Unrealized Losses | (463) | |||
| Fair Value | 4,009,567 | |||
| Commercial Paper [Member] | ||||
| Amortized Cost | 2,979,583 | |||
| Unrealized Gains | 72 | |||
| Unrealized Losses | (442) | |||
| Fair Value | 2,979,213 | |||
| Available-for-sale Securities [Member] | ||||
| Amortized Cost | 6,989,586 | |||
| Unrealized Gains | 99 | |||
| Unrealized Losses | (905) | |||
| Fair Value | $ 6,988,780 | |||