Annual report pursuant to Section 13 and 15(d)

15. Stock-Based Compensation (Details Narrative)

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15. Stock-Based Compensation (Details Narrative) - USD ($)
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Sep. 02, 2016
Sep. 12, 2011
Shares available for future issuance 438,616        
Tax benefit $ 403,000        
Decrease in stock based compensation deferred tax asset $ (2,368,000)        
Stock Options [Member]          
Aggregate intrinsic value per share $ 7.43        
Unrecognized compensation costs $ 624,000        
Weighted average amortization period 2 years 9 months 7 days        
Restricted Stock [Member]          
Unrecognized compensation costs $ 5,000        
Weighted average amortization period 5 months 20 days        
2006 Plan [Member]          
Shares available for future issuance 0        
2011 Plan [Member]          
Increase in shares authorized for issuance   197,450 102,863    
Shares initially authorized for issuance         9,508
Shares available for future issuance 351,139        
2016 Plan [Member]          
Increase in shares authorized for issuance   105,306 4,860    
Shares initially authorized for issuance       44,445  
Shares available for future issuance 87,477