CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ (672,000)	$ (1,293,000)	$ 13,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	1,561,000	1,485,000	816,000
Bad debt expense	62,000	20,000	34,000
Non-cash lease expense	37,000	0	0
Loss on inventory write-down	0	0	17,000
Loss on disposal of property, plant and equipment	13,000	10,000	0
Stock-based compensation expense	476,000	496,000	676,000
Deferred tax benefit	(8,000)	0	0
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	1,121,000	(1,264,000)	892,000
Inventory	305,000	(61,000)	(1,055,000)
Prepaid and other assets	(20,000)	(35,000)	(46,000)
Accounts payable and accrued liabilities	29,000	125,000	(759,000)
Deferred revenue	(535,000)	(61,000)	600,000
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	2,369,000	(578,000)	1,188,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment	(1,212,000)	(2,486,000)	(1,926,000)
Cash proceeds from sale of property, plant and equipment	10,000	23,000	0
Additions to intangible assets	(86,000)	(163,000)	0
Payments for business acquisitions, net of cash acquired	0	(7,314,000)	(1,552,000)
NET CASH USED IN INVESTING ACTIVITIES	(1,288,000)	(9,940,000)	(3,478,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options	0	342,000	313,000
Repayments of long-term debt	(601,000)	(3,184,000)	0
Proceeds from long-term debt	0	5,600,000	0
Shares repurchased	0	0	(745,000)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(601,000)	2,758,000	(432,000)
NET INCREASE (DECREASE) IN CASH	480,000	(7,760,000)	(2,722,000)
CASH, beginning of year	4,675,000	12,435,000	15,157,000
CASH, end of year	5,155,000	4,675,000	12,435,000
SUPPLEMENTAL CASH FLOW DISCLOSURES:
Income taxes paid	3,000	9,000	152,000
Interest paid on long-term debt	87,000	107,000	0
NON-CASH INVESTING ACTIVITIES:
Issuance of common stock for acquisition	0	1,899,000	0
Issuance of common stock for lease	83,000	0	0
Unpaid consideration related to acquisitions	0	0	181,000
Transfer of equipment to inventory	193,000	118,000	143,000
Property, plant and equipment financed through accounts payable	$ (13,000)	$ 28,000	$ 0