CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 3,567	$ 3,260
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	426	309
Amortization of loan fees	6	5
Gain from disposal of equipment		(7)
Share-based compensation	93	28
Non-cash lease expense	31
Gain on sale of investments		(356)
Deferred income taxes	207	1,026
Bad debt expense (recovery)	6	(14)
Changes in operating assets and liabilities:
Accounts receivable and other current receivables	(76)	(773)
Deferred costs	39	(235)
Inventory	(2,404)	(412)
Prepaid expenses and other assets	396	(410)
Accounts payable and accrued expenses	(301)	353
Deferred revenue	145	169
Income taxes payable	163	142
Net cash provided by operating activities	2,298	3,085
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of investments	(1,827)	(2,562)
Purchases of equipment and leasehold improvements	(422)	(1,048)
Proceeds from sale of investments		1,905
Proceeds from dividend reclassification as return of principal	15	23
Proceeds from collection of notes receivable		1,154
Proceeds from sale of equipment		7
Increase in intangibles	(19)	(11)
Net cash used in investing activities	(2,253)	(532)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchases of common stock	(2,977)	(2,675)
Proceeds from exercise of options and ESPP contributions	39	29
Payment of employee payroll taxes on net issuance of common stock		(101)
Proceeds from Minnesota Bank & Trust long-term debt, net of fees		4,940
Principal payments on notes payable and capital lease	(471)	(273)
Net cash provided by (used in) financing activities	(3,409)	1,920
Net increase (decrease) in cash and cash equivalents	(3,364)	4,473
Cash and cash equivalents, beginning of period	7,742	5,188
Cash and cash equivalents, end of period	4,378	9,661
Cash paid during the period for:
Interest	161	134
Income taxes	$ 382	$ 315