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Licensing and Other Arrangements - Rezolute - Additional Information (Details) - Rezolute [Member] |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 18 Months Ended | 21 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Jan. 30, 2019 USD ($) | Jan. 07, 2019 USD ($) CashPayment | Apr. 03, 2018 USD ($) Obligation shares | Dec. 06, 2017 USD ($) shares | Feb. 28, 2019 USD ($) | Apr. 30, 2018 USD ($) shares | Mar. 31, 2018 USD ($) shares | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2020 shares | Jun. 01, 2019 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2018 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |
License Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future milestone payments, maximum |  |  |  |  |  | $ 232,000,000 |  |  |  |  |  |  |  |  |
Agreement termination notice period |  |  |  |  |  | 90 days |  |  |  |  |  |  |  |  |
Reimbursable technology transfer expenses received |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |
Common stock value receivable |  |  |  | $ 8,500,000 |  |  |  |  |  |  |  |  |  |  |
Number of future cash payments upon closing of the qualified financing | CashPayment |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |
Percentage of net proceeds of each future financing upon closing of the qualified financing |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |
License Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future milestone payments, maximum |  |  |  |  |  |  |  |  |  |  |  |  | $ 237,000,000 |  |
Upfront option fee |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 |  |
Future cash payments upon closing of the qualified financing |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,500,000 |
License Agreement and Common Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Eligible to receive in cash |  |  |  |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |
Eligible to receive common stock, financing activities |  |  |  |  |  |  |  |  | $ 8,500,000 |  |  |  |  |  |
Eligible to receive shares of common stock | shares |  |  |  |  |  |  |  |  | 7,000,000 |  |  |  |  |  |
Gross proceeds from qualified financing |  | $ 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Additional common stock receive for qualified financing |  | $ 8,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, trading period |  | 10 days |  |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  |  |  |  |  |  |  |  |  | $ 8,000,000 |  |  |  |  |
Common stock received | shares |  |  |  |  | 8,093,010 |  |  |  |  |  |  |  |  |  |
Cash received |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |
Reimbursable technology transfer expenses received |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |
Number of performance obligations | Obligation |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |
Upfront consideration to incremental discount for future payment |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |
Remaining performance obligations |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
License agreement transaction price |  |  |  |  | 1,800,000 |  |  |  |  |  |  |  |  |  |
Value of common stock received |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |
Future cash payments upon closing of the qualified financing |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,500,000 |
Contract assets |  | $ 0 |  |  |  |  |  |  |  | 0 |  |  |  |  | $ 0
Contract liabilities |  | 0 |  |  |  |  |  |  |  | 0 |  |  |  |  | 0
Capitalized contract costs |  | 0 |  |  |  |  |  |  |  | 0 |  |  |  |  | $ 0
Doubtful revenue reversal of future cash payments |  | $ 2,500,000 |  |  |  |  |  |  |  | 2,500,000 |  |  |  |  |
Consideration due upon qualified financing event |  |  |  |  |  |  |  |  |  | 5,500,000 |  |  |  |  |
Future cash payments of revenue recognized |  |  |  |  |  |  |  |  |  | $ 2,500,000 |  |  |  |  |
License Agreement and Common Stock Purchase Agreement [Member] | Licenses and Related Materials, Product Data/Filing, Process and Know-how [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized the entire transaction price as revenue upon completion of delivery |  |  |  |  | $ 1,800,000 |  |  |  |  |  |  |  |  |  |
License Agreement and Common Stock Purchase Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Eligible to receive, in order to maintain license agreement | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock held for future issuance | shares |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |
Common stock purchase agreement description |  |  |  |  |  |  |  |  |  | Under the common stock purchase agreement, Rezolute granted the Company the right and option to sell the greater of (i) 5,000,000 shares of common stock or (ii) one third of the aggregate shares held by the Company upon failure by Rezolute to list its shares of its common stock on the Nasdaq Stock Market or a similar national exchange on or prior to December 31, 2018. |  |  |  |  |
Percentage of aggregate shares held for future issuance |  |  |  |  |  | 33.33% |  |  |  |  |  |  |  |  |
Cash received |  |  |  |  |  |  | $ 5,500,000 |  |  |  |  |  |  |  |
Reimbursable technology transfer expenses received |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |
Gross proceeds from preferred stock financing |  |  | $ 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Common Stock Purchase Agreement [Member] | Interim Financing Closing and Initial Closing Financing Activities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock received | shares |  |  |  |  |  |  |  | 8,093,010 |  |  |  |  |  |  |
Cash received |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |
Common Stock Purchase Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum number of shares of common stock sold back | shares |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |
Number of shares of common stock sold back | shares |  |  |  |  |  |  |  |  |  |  |  | 2,500,000 |  |  |

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