CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 935	$ 1,656
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	923	803
Bad debt expense	100	49
Inventory write-off	24	13
Loss on disposal of property, plant and equipment	1	0
Stock-based compensation expense	302	225
Income on derivative instrument	(15)	0
Deferred tax expense	244	89
Changes in operating assets and liabilities:
Accounts receivable	(1,597)	(3,067)
Inventory	355	640
Prepaid and other assets	488	(213)
Accounts payable and accrued liabilities	160	614
Contract asset and contract liability	1,050	960
NET CASH PROVIDED BY OPERATING ACTIVITIES	2,970	1,769
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment	(2,023)	(1,236)
Additions to intangible assets	(62)	(65)
NET CASH USED IN INVESTING ACTIVITIES	(2,085)	(1,301)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options	311	58
Proceeds from long-term debt	961	598
Repayments of long-term debt	(347)	(258)
Payments of debt issuance costs	0	(50)
NET CASH PROVIDED BY FINANCING ACTIVITIES	925	348
NET INCREASE IN CASH	1,810	816
CASH, beginning of period	5,416	4,512
CASH, end of period	7,226	5,328
SUPPLEMENTAL CASH FLOW DISCLOSURES:
Income taxes paid, net of refunds	(261)	62
Interest paid on long-term debt	80	42
NON-CASH INVESTING ACTIVITIES:
Property, plant and equipment financed through accounts payable	$ (263)	$ (18)