Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Cash Flows [Abstract]
Net income	$ 1,769,799	$ 833,361
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Deferred income taxes	278,447	63,883
Depreciation and amortization	78,225	92,820
Amortization of right of use assets	154,462	159,833
Provision for inventory obsolescence	25,000	25,000
Forgiveness of PPP Loan	(722,577)	(722,577)
Non-cash stock-based compensation	19,848	15,829
Changes in assets and liabilities:
Decrease (increase) in accounts receivable	547,937	(469,478)
Decrease in inventories	664,714	136,815
Decrease (increase) in prepaid expenses & other assets	(23,440)	148,743
Decrease in accounts payable and other accrued liabilities	(613,440)	(353,905)
Decrease in accrued payroll, vacation pay and payroll taxes	(81,159)	(54,983)
Decrease in deferred revenues	(51,944)	(54,978)
Decrease in operating lease liabilities	(154,461)	(159,833)
Increase in accrued legal damages	156,901	180,124
Net cash provided by (used in) operating activities	2,048,312	(159,346)
Cash flows from investing activities:
Purchases of equipment	(4,777)	(65,140)
Net cash used in investing activities	(4,777)	(65,140)
Cash flows from financing activities:
Proceeds from SBA PPP Loan	0	722,577
Payment of dividends	(240,000)	0
Repayment of line of credit	0	(680,000)
Repayment of finance lease obligations	0	(49)
Net cash (used in) provided by financing activities	(240,000)	42,528
Net increase (decrease) in cash and restricted cash	1,803,535	(181,958)
	5,496,325	5,134,739
Taxes paid	0	0
Interest paid	0	19,497
	7,299,860	4,952,781
Cash	3,485,275	3,126,195
Restricted cash	2,011,050	2,008,544
Cash	5,288,810	2,941,731
Restricted cash	$ 2,011,050	$ 2,011,050