Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 1,205,760	$ 1,118,338
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	98,600	598,699
Depreciation and amortization	17,538	5,015
Write-off of inventories	8,343	66,790
Deferred income tax	(69,000)	(857,000)
Increase (decrease) in cash flows as a result of changes in net assets and liabilities balances:
Accounts receivable	(273,744)	27,195
Inventories	(165,985)	(109,594)
Prepaid expenses and other current assets	(104,596)	(3,324)
Accounts payable	(7,164)	(53,120)
Customer deposit	16,800	9,240
Accrued expenses and other current liabilities	(182,500)	110,125
Due to shareholder	(51,134)	22,847
Net cash provided by operating activities	492,918	935,211
Cash flows from investing activities:
Purchase of equipment	(31,474)	(27,233)
Cash no longer restricted	233,050	(525)
Net cash provided by (used in) investing activities	201,576	(27,758)
Cash flows from financing activities:
Repayments of notes payable	(96,966)	(25,000)
Repayments of capital lease payable	(14,100)
Sale of common stock		300,000
Net cash provided by (used in) financing activities	(111,066)	275,000
Net increase in cash and cash equivalents	583,428	1,182,453
Cash and cash equivalents - beginning of year	1,398,848	216,395
Cash and cash equivalents - end of year	1,982,276	1,398,848
Cash paid for:
Interest	4,947	2,599
Taxes	31,604	1,000
Noncash Investing Activities:
Purchase of equipment with the assumption of capital lease	$ 128,807