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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Mar. 31, 2023
Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 3,268 $ 2,450
Adjustments to reconcile net income to net cash provided by operating activities:    
 Depreciation and amortization 594 546
 Amortization of loan fees 8 7
 Share-based compensation 584 932
Unrealized (gain) loss on marketable equity investments (231) 427
Non-cash straight-line lease amortization (1) 10
Gain on sale of investments (7)
Impairment of long-lived assets 61
Deferred income taxes 33
Bad debt expense (recovery) 2 (2)
Changes in operating assets and liabilities:    
Accounts receivable and other current receivables 4,817 2,255
Deferred costs 431 (148)
Inventory (2,467) (3,429)
Prepaid expenses and other assets (1,129) (863)
Accounts payable and accrued expenses (1,047) 673
Deferred revenue (956) 746
Income taxes payable 936 767
Net cash provided by operating activities 4,835 4,432
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of investments (334)
Purchases of equipment and improvements (822) (1,270)
Proceeds from sale of investments 89
Increase in intangibles (32)
Net cash used in investing activities (733) (1,636)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Repurchases of common stock (1,547) (1,255)
    Proceeds from exercise of options and ESPP contributions 89 60
    Payment of employee payroll taxes on net issuance of common stock (223)
    Proceeds from Minnesota Bank & Trust revolving loan, net of fees 3,584
Principal payments on notes payable and revolving loan (4,766) (561)
Net cash used in financing activities (2,863) (1,756)
Net increase in cash and cash equivalents 1,239 1,040
Cash and cash equivalents, beginning of period 849 3,721
Cash and cash equivalents, end of period 2,088 4,761
Cash paid during the period for:    
Interest 384 311
Income taxes 1,107 1,025
Non-cash investing and financing activity:    
Cashless stock option exercise $ 45