Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies (Details Narrative)

v3.24.3
Organization and Summary of Significant Accounting Policies (Details Narrative) - USD ($)
3 Months Ended 9 Months Ended
Jul. 11, 2024
May 28, 2024
Apr. 05, 2024
Mar. 26, 2024
Feb. 02, 2024
Dec. 14, 2023
Feb. 10, 2023
Feb. 25, 2021
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2024
Sep. 30, 2023
Jun. 11, 2024
Dec. 31, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Impairment charge                 $ 4,500,000           $ 4,457,000    
Net loss                 6,239,000 $ 2,204,000 $ 886,000 $ 3,190,000 $ 2,455,000 $ 293,000 9,329,000 5,938,000    
Cash in operating activities                             7,518,000 10,987,000    
Accumulated deficit                 $ 280,043,000           $ 280,043,000     $ 270,714,000
Stock issued in public offering     358,000 142,000 80,000   10,750                      
Sale of stock price     $ 4.20 $ 9.40 $ 50.00                          
Offering expenses payable     $ 1,500,000 $ 1,300,000                            
Common stock, par value                 $ 0.01           $ 0.01     $ 0.01
Gross proceeds common stock                             $ 6,075,000 4,840,000    
Minimum bid price                                 $ 1.00  
Reduction in workforce                 $ 407,000         $ 407,000    
Reverse stock split, description   1 for 200 reverse stock split                                
State and local income tax percentage           5.00%                        
ATM Agreement [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Stock issued in public offering                 595,560           602,357      
Available for sale $ 3,100,000                                  
Gross proceeds common stock                 $ 3,100,000           $ 3,700,000      
ATM Agreement [Member] | Maximum [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Public float               $ 75,000,000.0                    
ATM Agreement [Member] | Maxim Group LLC [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Common stock, par value               $ 0.01                    
Aggregate offering price               $ 15,000,000                    
Class E and Class F Warrants [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Warrants exercise price         $ 50.00                          
Common Stock Warrants [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Gross proceeds from sale of stock         $ 4,000,000.0   $ 12,000,000.0                      
Common Stock and Prefunded Warrants [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Gross proceeds from sale of stock         600,000   5,400,000                      
Offering costs         500,000   4,800,000                      
Offering fees and expenses         4,000,000                          
Derivative Liabilities for Common Stock Warrants [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Gross proceeds from sale of stock         3,400,000   6,700,000                      
Offering costs         500,000   700,000                      
Agent Warrant Offering [Member]                                    
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                                    
Offering costs         $ 100,000   $ 100,000