Condensed Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows From Operating Activities
Net income	$ 81,000	$ 439,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	134,000	106,000
Amortization of finite-life intangible assets	20,000	52,000
Share-based compensation expense	95,000	249,000
Deferred income taxes	6,000	32,000
Changes in operating assets and liabilities:
Accounts receivable	95,000	(1,331,000)
Contract assets	(167,000)	74,000
Inventories	(500,000)	91,000
Prepaid expenses and other assets	(125,000)	(186,000)
Income tax payable, net	(175,000)	(498,000)
Accounts payable and accrued liabilities	(26,000)	(455,000)
Accrued compensation	(1,132,000)	851,000
Net cash used in operating activities	(1,694,000)	(576,000)
Cash Flows From Investing Activities
Expenditures for property and equipment	(241,000)	(225,000)
Expenditures for finite-life intangible assets	(15,000)	(45,000)
Net cash used in investing activities	(256,000)	(270,000)
Cash Flows From Financing Activities
Issuance of common stock upon exercise of options		1,000
Taxes paid on net share settlement of stock option exercises	(60,000)	(64,000)
Repurchase of common stock	(145,000)
Net cash used in financing activities	(205,000)	(63,000)
Net decrease in cash	(2,155,000)	(909,000)
Cash
Beginning of period	8,153,000	11,889,000
End of period	5,998,000	10,980,000
Supplemental Disclosures of Cash Flow Information
Cash paid for income taxes	135,000	574,000
Supplemental Disclosures of Noncash Investing and Financing Activities
Property and equipment acquisitions in accounts payable	46,000	2,000
Intangible asset acquisitions in accounts payable	9,000	7,000
Lease assets obtained in exchange for new operating lease liabilities		53,000
Demonstration equipment returned to inventory	$ 5,000	$ 1,000