Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ 1,701,587	$ (298,030)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	74,353	52,615
Amortization of right of use assets	150,783	0
Provision for inventory obsolescence	57,000	55,000
Change in fair value of common stock warrant	73,000	23,000
Non-cash stock-based compensation	16,393	18,597
Changes in assets and liabilities:
Increase in accounts receivable	(616,640)	(1,176,461)
(Increase) decrease in inventories	(193,247)	1,120,658
(Increase) in prepaid expenses & other assets	(86,996)	(92,644)
Decrease in accounts payable and accrued liabilities	(165,350)	(783,601)
Increase (decrease) in accrued payroll, vacation pay and payroll taxes	93,591	(132,288)
Increase (decrease) in deferred revenues	185,522	(31,353)
Decrease in operating lease liabilities	(150,783)	0
Increase in accrued legal damages	258,761	156,657
Net cash provided by (used in) operating activities	1,397,974	(1,087,850)
Cash flows from investing activities:
Purchases of equipment	(102,341)	0
Net cash used in investing activities	(102,341)	0
Cash flows from financing activities:
Repayment of long-term debt	0	(2,124)
Repayment of line of credit	(90,000)	(180,000)
Payment of warrant liability	(116,500)	0
Proceeds from issuance of preferred stock, net of expenses	0	987,925
Proceeds from short-swing profits from an investor	0	143,382
Repayment of finance lease obligations	(4,950)	(5,097)
Net cash (used in) provided by financing activities	(211,450)	944,086
Net increase (decrease) in cash, cash equivalents and restricted cash	1,084,183	(143,764)
Cash, cash equivalents and restricted cash at beginning of period	2,590,727	2,308,678
Taxes paid	0	0
Interest paid	35,080	41,475
Cash, cash equivalents and restricted cash at end of period	3,674,910	2,164,914
Cash and cash equivalents	585,856	307,812
Restricted cash	2,004,871	2,000,866
Cash and cash equivalents	1,667,364	161,031
Restricted cash	$ 2,007,546	$ 2,003,883