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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Mar. 31, 2022
Summary of Significant Accounting Policies [Abstract]  
Reconciliation of Basic and Diluted Net Income (Loss) Per Share
The following presents a reconciliation of basic and diluted net income (loss) per share.

 
Years Ended March 31,
  
   
2022
    
2021
    
2020
  
Net income (loss)
  
$
7,361,000
    
$
21,476,000
 
$
(7,290,000
)
Basic shares
    
19,119,727
      
19,023,145
      
18,913,788
  
Effect of dilutive stock options and warrants
    
439,919
      
364,410
      
-
  
Diluted shares
    
19,559,646
      
19,387,555
      
18,913,788
  
Net income (loss) per share:
                        
Basic net income (loss) per share
  
$
0.38
    
$
1.13
 
$
(0.39
)
Diluted net income (loss) per share
  
$
0.38
    
$
1.11
 
$
(0.39
)
Gain (Loss) on Equity Investments
The following summarizes the gain (loss) on the Company’s equity investments:

 
Years Ended March 31,
  
   
2022
    
2021
    
2020
  
Net gain recognized on equity securities
  
$
163,000
    
$
521,000
    
$
96,000
  
Less: net gain recognized on equity securities sold
    
-
      
10,000
      
193,000
  
Unrealized gain (loss) recognized on equity securities still held
  
$
163,000
    
$
511,000
    
$
(97,000
)