CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 2,266	$ 214	$ (672)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	1,606	1,663	1,561
Bad debt expense	111	81	62
Non-cash lease expense	0	46	37
Inventory write-offs	29	55	0
Loss on disposal of property, plant and equipment	16	21	13
Stock-based compensation expense	518	400	476
Loss on derivative instrument	113	0	0
Deferred tax expense (benefit)	(1,495)	251	(8)
Vendor receivable write-off	657	0	0
Changes in operating assets and liabilities:
Accounts receivable	(2,971)	(3,000)	1,121
Inventory	(1,887)	(492)	305
Prepaid and other assets	(373)	(531)	(20)
Accounts payable and accrued liabilities	1,036	1,498	29
Contract asset and contract liability	1,066	719	(535)
NET CASH PROVIDED BY OPERATING ACTIVITIES	692	925	2,369
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment	(3,969)	(749)	(1,212)
Cash proceeds from sale of property, plant and equipment	3	0	10
Additions to intangible assets	(188)	(282)	(86)
NET CASH USED IN INVESTING ACTIVITIES	(4,154)	(1,031)	(1,288)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options	668	0	0
Repayments of long-term debt	(517)	(537)	(601)
Payments of debt issuance costs	(50)	0	0
Proceeds from long-term debt	4,265	0	0
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	4,366	(537)	(601)
NET INCREASE (DECREASE) IN CASH	904	(643)	480
CASH, beginning of year	4,512	5,155	4,675
CASH, end of year	5,416	4,512	5,155
SUPPLEMENTAL CASH FLOW DISCLOSURES:
Income taxes paid	99	37	3
Interest paid on long-term debt	127	89	87
NON-CASH INVESTING ACTIVITIES:
Issuance of common stock for lease	0	0	83
Transfer of equipment to inventory	28	393	193
Property, plant and equipment financed through accounts payable	$ 331	$ 12	$ (13)