Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Accounts - Equipment (Details)

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Balance Sheet Accounts - Equipment (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Equipment, Cost $ 632,050   $ 632,050   $ 679,135
Accumulated Depreciation 574,480   574,480   585,558
Equipment, Net 57,570   57,570   93,577
Depreciation expense 11,000 $ 16,000 20,000 $ 34,000  
Computers and electronics          
Equipment, Cost 303,337   303,337   303,337
Accumulated Depreciation 303,337   303,337   303,337
Furniture and fixtures          
Equipment, Cost 36,795   36,795   36,795
Accumulated Depreciation 36,795   36,795   36,795
Demonstration equipment          
Equipment, Cost 123,301   123,301   170,386
Accumulated Depreciation 65,731   65,731   76,809
Equipment, Net 57,570   57,570   93,577
Manufacturing equipment          
Equipment, Cost 88,742   88,742   88,742
Accumulated Depreciation 88,742   88,742   88,742
Tools and parts          
Equipment, Cost 11,422   11,422   11,422
Accumulated Depreciation 11,422   11,422   11,422
Assets under capital lease          
Equipment, Cost 68,453   68,453   68,453
Accumulated Depreciation $ 68,453   $ 68,453   $ 68,453