CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 12,868	$ 2,266	$ 214
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,989	1,606	1,663
Bad debt expense	157	111	81
Non-cash lease expense	0	0	46
Inventory write-offs	131	29	55
Loss on disposal of property, plant and equipment	1	16	21
Stock-based compensation expense	974	518	400
(Income) loss associated with derivative instrument	(47)	113	0
Deferred tax expense (benefit)	1,095	(1,495)	251
Vendor receivable write-off	0	657	0
Gain on forgiveness of PPP loan	(2,183)	0	0
Changes in operating assets and liabilities:
Accounts receivable	1,894	(2,971)	(3,000)
Inventory	(532)	(1,887)	(492)
Prepaid and other assets	(128)	(373)	(531)
Accounts payable and accrued liabilities	1,080	1,036	1,498
Contract asset and contract liability	4,658	1,066	719
NET CASH PROVIDED BY OPERATING ACTIVITIES	21,957	692	925
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment	(2,803)	(3,969)	(749)
Proceeds from sale of property, plant and equipment	3	3	0
Additions to intangible assets	(82)	(188)	(282)
NET CASH USED IN INVESTING ACTIVITIES	(2,882)	(4,154)	(1,031)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options	3,164	668	0
Proceeds of long-term debt	973	4,265	0
Repayments of long-term debt	(762)	(517)	(537)
Payments on financing lease liabilities	(99)	0	0
Payments of debt issuance costs	0	(50)	0
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	3,276	4,366	(537)
NET INCREASE (DECREASE) IN CASH	22,351	904	(643)
CASH, beginning of year	5,416	4,512	5,155
CASH, end of year	27,767	5,416	4,512
SUPPLEMENTAL CASH FLOW DISCLOSURES:
Income taxes paid, net of refunds	128	99	37
Interest paid on long-term debt	193	127	89
NON-CASH INVESTING ACTIVITIES:
Transfer of equipment to inventory	0	28	393
Property, plant and equipment financed through accounts payable	(272)	331	12
Purchase of previously leased property, plant and equipment financed with note payable	$ 873	$ 0	$ 0