Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,473,758)	$ (2,172,575)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	92,961	119,773
Amortization of intangible assets	422,183	488,049
Reserve for obsolete inventory	257,779	150,000
Deferred tax	(429,546)	(191,523)
Forgiveness of accounts payable	0	(2,382)
Increase (decrease) in cash due to change in:
Accounts receivable	3,852,985	3,039,951
Inventories	304,813	1,613,733
Prepaid expenses and other current assets	(9,008)	101
Prepaid income taxes	28,240	0
Advance payments to vendors	27,356	48,404
Other assets	(118,460)	(2,985)
Accounts payable	(1,937,071)	(5,250,597)
Income tax payable	(3,096)	3,750
Advance payments from customers	(228,598)	176,601
Accrued liabilities	(11,690)	(28,994)
Net cash provided by (used in) operating activities	775,090	(2,008,694)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(5,380,226)	0
Purchases of shares of a subsidiary	(234,330)	0
Purchases of property and equipment	(100,768)	(23,903)
Payments for capitalized development costs	(465,352)	(291,386)
Purchases of intangible assets	(70,034)	(83,896)
Net cash used in investing activities	(6,250,710)	(399,185)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash received from exercise of stock options	0	67,000
Net cash provided by financing activities	0	67,000
Effect of foreign currency translation	(52,819)	31,822
Net decrease in cash and cash equivalents	(5,528,439)	(2,309,057)
Cash and cash equivalents, beginning of year	11,975,944	14,285,001
Cash and cash equivalents, end of year	6,447,505	11,975,944
Supplemental disclosure of cash flow information:
Cash paid during the periods for: Income taxes	$ (801)	$ (800)