CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,450	$ 5,039
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	546	502
Amortization of loan fees	7	46
Share-based compensation	932	508
Unrealized (gain) loss on marketable equity investments	427	(1,442)
Non-cash lease expense	10	21
Gain on sale of investments		(795)
Impairment of long-lived assets	61
Bad debt expense (recovery)	(2)	3
Changes in operating assets and liabilities:
Accounts receivable and other current receivables	2,255	(6,769)
Deferred costs	(148)	(18)
Inventory	(3,429)	(130)
Prepaid expenses and other assets	(863)	(963)
Accounts payable and accrued expenses	673	792
Deferred revenue	746
Income taxes payable	767	403
Net cash provided by (used in) operating activities	4,432	(2,803)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of investments	(334)
Purchases of equipment and improvements	(1,270)	(872)
Proceeds from sale of investments		3,008
Purchase of land and building		(6,499)
Increase in intangibles	(32)	(12)
Net cash used in investing activities	(1,636)	(4,375)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchases of common stock	(1,255)	(4,039)
Proceeds from exercise of options and ESPP contributions	60	97
Payment of employee payroll taxes on net issuance of common stock		(259)
Proceeds from Minnesota Bank & Trust long-term debt, net of fees		9,139
Principal payments on notes payable and finance lease	(561)	(307)
Net cash provided by (used in) financing activities	(1,756)	4,631
Net increase (decrease) in cash and cash equivalents	1,040	(2,547)
Cash and cash equivalents, beginning of period	3,721	6,421
Cash and cash equivalents, end of period	4,761	3,874
Supplemental disclosures of cash flow information:
Interest	311	190
Income taxes	1,025	1,382
Non-cash investing and financing activity:
Cashless stock option exercise	$ 45	$ 4