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Note 4 - Royalty Monetization (Details Textual) $ in Thousands |  | 6 Months Ended
--- | --- | ---
Mar. 09, 2011 USD ($) | Jun. 30, 2020 USD ($) ¥ / $ | Jun. 30, 2019 USD ($)
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative, Loss on Derivative |  | $ 590 | $ 646
PhaRMA Notes Member] | Currency Hedge Agreement [Member] |  |  |
Derivative, Forward Exchange Rate (in JPY per USD) | ¥ / $ |  | 100 |
JPR Royalty Sub LLC [Member] | PhaRMA Notes Member] |  |  |
Private Placement of Senior Secured Notes | $ 30,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 14.00% |  |
Percentage of Carrying Amount in Excess of Fair Value |  | 3.00% |
JPR Royalty Sub LLC [Member] | PhaRMA Notes Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Notes Payable, Fair Value Disclosure |  | $ 30,000 |
JPR Royalty Sub LLC [Member] | Royalty Monetization [Member] |  |  |
Debt Instrument, Face Amount | $ 30,000 |  |
Proceeds from Issuance of Secured Debt | 22,691 |  |
Transaction Costs | 4,309 |  |
Interest Reserve | $ 3,000 |  |

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