Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies - Components of Inventories (Details)

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Organization and Summary of Significant Accounting Policies - Components of Inventories (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Inventory [Line Items]    
Raw materials and supplies $ 170,000 $ 563,000
Finished goods 158,000  
Total inventories 328,000 563,000
Discontinued operations | U.S. commercialization activities    
Inventory [Line Items]    
Finished goods inventory reclassified to discontinued operations $ 0 $ 435,000