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Stockholders' Equity - Securities Purchase Agreement (Details) - USD ($) |  |  |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 15, 2020 | May 26, 2020 | May 14, 2020 | May 11, 2020 | Apr. 09, 2020 | Mar. 30, 2020 | Jun. 30, 2020 | [1]
Class of Stock [Line Items] |  |  |  |  |  |  |
Sale of stock, number of shares issued (in shares) |  | 1,205,400 | 146,854 | 447,761 | 904,970 | 800,000 |
Number of shares called by warrants (in shares) | 2,213,115 |  |  |  |  |  |
Months until exercisable | 6 months |  |  |  |  |  |
Exercise price of warrants (in USD per share) | $ 3.05 |  |  |  |  |  |
Expiration term | 5 years 6 months |  |  |  |  |  |
Proceeds from sale of stock |  | $ 2,500,000 | $ 810,000 |  | $ 1,100,000 | $ 1,000,000.0 | $ 17,278,428
Sale of stock, price per share (in dollars per share) |  |  | $ 1.43 | $ 1.34 |  |  |
Series I Warrant |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares called by warrants (in shares) |  |  |  |  |  | 131,967 |
Series J Warrant |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares called by each warrant |  |  |  |  |  | 1 |
Months until exercisable |  |  |  |  |  | 6 months |
Exercise price of warrants (in USD per share) |  |  |  |  |  | $ 0.948 |
Expiration term |  |  |  |  |  | 5 years 6 months |
Series K Warrant |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares called by warrants (in shares) |  |  |  |  | 255,000 |  |
Series L Warrants |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares called by each warrant |  |  |  |  | 1 |  |
Months until exercisable |  |  |  |  | 6 months |  |
Exercise price of warrants (in USD per share) |  |  |  |  | $ 0.81 |  |
Expiration term |  |  |  |  | 5 years 6 months |  |
Series M Warrant |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares called by warrants (in shares) |  | 482,160 |  |  |  |  |
Months until exercisable |  | 6 months |  |  |  |  |
Exercise price of warrants (in USD per share) |  | $ 2.024 |  |  |  |  |
Expiration term |  | 5 years 6 months |  |  |  |  |
[1] | Net of expenses of $616,143, and fair value of warrants issued as a transaction advisory fee as of the date of issuance of $370,666.

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