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6. INCOME TAXES (Details) - USD ($)
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
INCOME TAXES      
Unrecognized tax benefits, noncurrent $ 0    
Deferred tax assets unrecognized tax benefit 3,400,000 $ 3,900,000  
Deferred tax assets, gross 24,856,000 20,176,000  
Valuation allowance (22,794,000) (20,165,000)  
Net deferred tax asset 22,800,000 20,200,000  
Provision for income taxes 130,000 70,000 $ 372,000
Loss before income taxes (10,509,000) (20,017,000) (15,605,000)
Deferred tax liability 16,000 14,000  
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits, beginning of period 3,948,000 3,723,000 3,502,000
Lapses of applicable statutes of limitations (767,000)    
Additions based on tax positions related to current year 175,000 225,000 221,000
Unrecognized tax benefits, end of period $ 3,356,000 $ 3,948,000 $ 3,723,000