Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net income (loss)	$ 794,010	$ (937,483)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	41,125	37,846
Amortization of right of use assets	99,663	0
Provision for inventory obsolescence	27,000	45,000
Change in fair value of common stock warrant	73,000	0
Non-cash stock-based compensation	11,117	13,177
Changes in assets and liabilities:
Decrease in accounts receivable	894,205	325,496
(Increase) decrease in inventories	(168,116)	462,770
(Increase) decrease in prepaid expenses & other assets	(20,587)	16,911
Decrease in accounts payable and other accrued expenses	(401,565)	(225,114)
Increase (decrease) in accrued payroll, vacation pay and payroll taxes	71,921	(84,275)
Increase in deferred revenues	306,405	242,963
Decrease in operating lease liabilities	(99,663)	0
Increase in accrued legal damages	171,106	84,654
Net cash provided by (used in) operating activities	1,799,621	(18,055)
Cash flows from investing activities:
Purchases of equipment	(63,536)	0
Net cash used in investing activities	(63,536)	0
Cash flows from financing activities:
Repayment of long-term debt	0	(2,124)
Repayment of line of credit	(70,000)	(160,000)
Proceeds from short-swing profits from an investor	0	156,175
Repayment of finance lease obligations	(3,683)	(3,358)
Net cash used in financing activities	(73,683)	(9,307)
Net increase (decrease) in cash, cash equivalents and restricted cash	1,662,402	(27,362)
	2,590,727	2,308,678
Taxes paid	0	0
Interest paid	28,165	28,278
	4,253,129	2,281,316
Cash and cash equivalents	585,856	307,812
Restricted cash	2,004,871	2,000,866
Cash and cash equivalents	2,246,595	278,443
Restricted cash	$ 2,006,534	$ 2,002,873