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Licensing and Other Arrangements - Rezolute - Additional Information (Details) |  |  |  |  |  | 3 Months Ended | 12 Months Ended | 18 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Apr. 03, 2018 USD ($) Obligation shares | Mar. 30, 2018 USD ($) shares | Dec. 06, 2017 USD ($) shares | Mar. 31, 2018 USD ($) shares | Dec. 31, 2018 USD ($) | Jun. 01, 2019 USD ($) | Dec. 31, 2017 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Gross proceeds from debt financing activity |  |  |  |  |  |  | $ 7,500,000 |  |
Rezolute [Member] | Initial Closing [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock value receivable |  |  |  | $ 5,000,000 |  |  |  |  |
Rezolute [Member] | Qualified Financing [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock value receivable |  |  |  | 7,000,000 |  |  |  |  |
Rezolute [Member] | 2019 Closing [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock value receivable |  |  |  | $ 7,000,000 |  |  |  |  |
Rezolute [Member] | License Agreement [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Future milestone payments, maximum |  |  |  |  | $ 232,000,000 |  |  |  |
Eligible to receive in cash |  |  |  |  | 6,000,000 |  |  |  |
Eligible to receive common stock, financing activities |  |  |  |  | $ 12,000,000 |  |  |  |
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% |  |  |  |
Agreement termination notice period |  |  |  |  | 90 days |  |  |  |
Reimbursable technology transfer expenses received |  |  |  |  |  |  | $ 300,000 |  |
Contract assets |  |  |  |  |  |  |  |  | $ 0
Contract liabilities |  |  |  |  |  |  | $ 0 |  | 0
Capitalized contract costs |  |  |  |  |  |  |  |  | $ 0
Rezolute [Member] | 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 |
Gross proceeds from qualified financing |  | $ 20,000,000 |  |  |  |  |  |  |
Additional common stock receive for qualified financing |  | $ 7,000,000 |  |  |  |  |  |  |
Common stock, trading period |  | 10 days |  |  |  |  |  |  |
Eligible to receive, in order to maintain license agreement | $ 15,000,000 |  |  |  |  |  |  |  |
Rezolute [Member] | Amended Common Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock received | shares |  |  | 8,023,758 |  |  |  |  |  |
Cash received |  |  | $ 500,000 |  |  |  |  |  |
Gross proceeds from debt financing activity |  |  | 4,000,000 |  |  |  |  |  |
Reimbursable technology transfer expenses received |  |  | $ 300,000 |  |  |  |  |  |
Rezolute [Member] | Amended Common Stock Purchase Agreement [Member] | Initial Closing [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock shares receivable | shares |  |  |  | 7,000,000 |  |  |  |  |
Rezolute [Member] | Amended Common Stock Purchase Agreement [Member] | Qualified Financing [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock value receivable |  |  |  | $ 8,500,000 |  |  |  |  |
Rezolute [Member] | Amended Common Stock Purchase Agreement [Member] | 2019 Closing [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock value receivable |  |  |  | $ 8,500,000 |  |  |  |  |
Rezolute [Member] | Common Stock Purchase Agreement [Member] | Interim Financing Closing [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
Common stock received | shares |  |  |  |  |  | 69,252,000 |  |  |
Cash received |  |  |  |  |  | $ 50,000 |  |  |
Contract revenue |  |  |  |  |  | $ 0 |  |  |
Rezolute [Member] | Amended License Agreement and Amended Common Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |
Rezolute [Member] | Amended License Agreement and Amended 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 |  |  |  |  |  |

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