Note 11 - Related Party Transactions (Details Textual) $ in Thousands |
3 Months Ended |
|---|---|
|
Mar. 31, 2019
USD ($)
| |
| Moores Cancer Center at University of California San Diego [Member] | Research and Development Expense, Related Party [Member] | |
| Related Party Transaction, Amounts of Transaction | $ 62 |
| X | ||||||||||
- Definition Amount of transactions with related party during the financial reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|