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Summary of Significant Accounting Policies - Schedule of Concentration of Risks (Details) (10-K) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2017
Concentration Percentage | 10.00% |  | 10.00% | 10.00% |
Sales Revenue, Net [Member] |  |  |  |  |
Concentration Percentage |  | 67.70% |  | 53.70% | 57.80%
Sales Revenue, Net [Member] | Customer A [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 24.60% | 0.00%
Sales Revenue, Net [Member] | Customer B [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 19.10% | 0.00%
Sales Revenue, Net [Member] | Customer C [Member] |  |  |  |  |
Concentration Percentage |  | 35.50% |  | 10.00% | 57.80%
Sales Revenue, Net [Member] | Customer D [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 0.00% | 0.00%
Sales Revenue, Net [Member] | Customer E [Member] |  |  |  |  |
Concentration Percentage |  | 17.10% |  | 0.00% | 0.00%
Sales Revenue, Net [Member] | Customer F [Member] |  |  |  |  |
Concentration Percentage |  | 15.10% |  | 0.00% | 0.00%
Sales Revenue, Net [Member] | Customer G [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 0.00% | 0.00%
Sales Revenue, Net [Member] | Customer H [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 0.00% | 0.00%
Accounts receivable [Member] |  |  |  |  |
Concentration Percentage |  | 67.20% |  | 48.40% | 60.50%
Accounts receivable [Member] | Customer A [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 29.40% | 0.00%
Accounts receivable [Member] | Customer B [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 0.00% | 0.00%
Accounts receivable [Member] | Customer C [Member] |  |  |  |  |
Concentration Percentage |  | 54.60% |  | 0.00% | 27.40%
Accounts receivable [Member] | Customer D [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 19.00% | 0.00%
Accounts receivable [Member] | Customer E [Member] |  |  |  |  |
Concentration Percentage |  | 12.60% |  | 0.00% | 0.00%
Accounts receivable [Member] | Customer F [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 0.00% | 0.00%
Accounts receivable [Member] | Customer G [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 0.00% | 20.40%
Accounts receivable [Member] | Customer H [Member] |  |  |  |  |
Concentration Percentage |  | 0.00% |  | 0.00% | 12.70%

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