XML 58 R48.htm IDEA: XBRL DOCUMENT v3.22.2
Note 2 - Summary of Significant Accounting Policies - Outstanding Stock Options and Stock Warrants Excluded From the Diluted Net Loss Per Share Computation (Details) - shares
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Anti-dilutive securities (in shares) 78,078,000 10,955,000
Series B Preferred [Member]    
Anti-dilutive securities (in shares) 29,050 0
Share-Based Payment Arrangement, Option [Member]    
Anti-dilutive securities (in shares) 4,446,000 3,873,000
Warrant [Member]    
Anti-dilutive securities (in shares) 44,582,000 7,082,000