Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net (loss)/income from continuing operations	$ (1,842,804)	$ (1,329,077)	$ 5,304,056
Adjustments to reconcile net (loss)/income to net cash provided by (used in) continuing operating activities:
Depreciation and amortization and other non-cash items	1,066,844	1,651,972	1,439,972
Bad debt expense		(30,000)	(10,000)
Deferred income tax benefit	(939,857)	(502,262)	(2,892,428)
Stock-based compensation	1,086,139	1,629,644	1,107,250
Deferred income	(18,598)	(8,966)	(46,052)
Deferred lease liability	92	9,262	(16,614)
Changes in operating assets and liabilities:
Accounts receivable	(1,263,962)	641,820	(712,095)
Inventories	(873,136)	(2,823,304)	(1,259,986)
Prepaid expenses and other assets	(404,608)	(186,211)	(129,828)
Accounts payable, accrued expenses	1,917,232	630,882	(412,936)
Net cash (used in)/provided by continuing operations	(1,272,658)	(316,240)	2,371,339
Investing activities
Acquisition of property, plant and equipment	(490,421)	(471,829)	(345,312)
Payments for assets acquisition			(328,136)
Additional patents	(224,394)	(132,731)	(104,755)
Net cash used in investing activities from continuing operations	(714,815)	(604,560)	(778,203)
Financing activities
Proceeds from sale of common stock	4,000,000
Proceeds from exercise of stock options	333,592	189,447	723,560
Net cash provided by financing activities from continuing operations	4,333,592	189,447	723,560
Cash flows from discontinued operations
Net cash provided by operating activities			17,115
Net cash provided by investing activities	161,625	156,931	250,000
Net cash provided by discontinued operations	161,625	156,931	267,115
Net (decrease)/increase in cash and cash equivalents	2,507,744	(574,422)	2,583,811
Cash and cash equivalents at beginning of period	9,049,327	9,623,749	7,039,938
Cash and cash equivalents at end of period	11,557,071	9,049,327	9,623,749
Cash paid for:
Income taxes	$ 10,179	$ 140,931	$ 73,568