INCOME PER COMMON SHARE, Potentially Diluted Securities (Details) - shares	Mar. 31, 2021	Mar. 31, 2020
Potentially Diluted Securities [Abstract]
Potentially diluted securities (in shares)	105,357	188,526
Convertible Preferred Stock [Member]
Potentially Diluted Securities [Abstract]
Potentially diluted securities (in shares)	310	6,310
Employee Stock Options [Member]
Potentially Diluted Securities [Abstract]
Potentially diluted securities (in shares)	98,994	114,496
Non-Employee Stock Options [Member]
Potentially Diluted Securities [Abstract]
Potentially diluted securities (in shares)	6,053	36,053
Employee Restricted Stock [Member]
Potentially Diluted Securities [Abstract]
Potentially diluted securities (in shares)	0	5,000
Non-Employee Restricted Stock [Member]
Potentially Diluted Securities [Abstract]
Potentially diluted securities (in shares)	0	26,667