Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Statement of Cash Flows [Abstract]
Net (loss) income	$ (232,869)	$ 575,501
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities
Deferred income taxes	(61,917)	153,114
Depreciation and amortization	15,944	31,381
Non-cash lease expense	47,885	55,300
(Recovery of) provision for inventory obsolescence	(25,048)	0
Non-cash stock-based compensation	6,235	6,168
(Increase) decrease in accounts receivable	(323,287)	615,045
Decrease in inventories	149,617	386,646
(Increase) decrease in prepaid expenses & other assets	(155,078)	3,514
(Decrease) in accounts payable and other accrued liabilities	(67,351)	(555,716)
Increase in accrued payroll, vacation pay and payroll taxes	14,243	84,842
Increase in deferred revenues	19,428	1,129
(Decrease) in operating lease liabilities	(47,885)	(55,300)
Increase in accrued legal damages	51,920	51,920
Net cash (used in) provided by operating activities	(608,163)	1,353,544
Cash flows from investing activities:
Purchases of equipment	(11,733)	0
Net cash used in investing activities	(11,733)	0
Payment of dividends	(80,000)	(80,000)
Net cash used in financing activities	(80,000)	(80,000)
Net (decrease) increase in cash and restricted cash	(699,896)	1,273,544
	6,960,740	5,496,325
Supplemental cash flow information:
Taxes paid	0	0
Interest paid	0	0
	6,260,844	6,769,869
Beginning of period
Cash	4,949,690	3,485,275
Restricted cash	2,011,050	2,011,050
End of period
Cash	4,249,794	4,758,819
Restricted cash	$ 2,011,050	$ 2,011,050