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Consolidated Condensed Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Cash flows from operating activities:    
Net income $ 3,216,235 $ 2,829,697
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 584,923 608,903
Amortization of operating right of use asset 31,352 29,838
Stock compensation expense 202,987 171,373
Bad debt expense 300,000 150,000
(Increase) decrease in:    
Accounts receivables (460,270) (1,389,753)
Long-term receivables, prepaids and other assets (54,102) 127,755
Increase (decrease) in:    
Accounts payable 26,786 (99,081)
Operating lease liability (31,218) (28,616)
Accrued liabilities (207,036) (71,733)
Deferred revenue 1,718,973 123,564
Net cash provided by operating activities 5,328,630 2,451,947
Cash flows from investing activities:    
Purchase of property and equipment 0 (10,523)
Sale (purchase) of marketable securities 18,869 (5,904)
Net cash provided by (used in) investing activities 18,869 (16,427)
Cash flows from financing activities:    
Common Stock buyback/retirement (100,016) (1,515,574)
Proceeds from exercise of warrants 79,120 0
Proceeds from employee stock plan 64,352 57,743
Dividends paid (831,898) (840,427)
Payments on notes payable and capital leases (171,541) (125,075)
Net cash used in financing activities (2,459,963) (3,173,328)
Net increase (decrease) in cash and cash equivalents 2,887,536 (737,808)
Cash and cash equivalents at beginning of period 25,153,862 23,990,879
Cash and cash equivalents at end of period 28,041,398 23,253,071
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 375,119 317,944
Cash paid for interest 4,832 6,434
Cash paid for operating leases $ 37,371 $ 36,282
Common stock to pay accrued liabilities (in shares) 137,440 110,000
Dividends accrued on preferred stock $ 203,498 $ 293,222
Right-of-use asset 654,444 0
Series B Preferred Stock [Member]    
Cash flows from financing activities:    
Redemption of Series B Preferred (1,499,980) 0
Series B-1 Preferred Stock [Member]    
Cash flows from financing activities:    
Redemption of Series B Preferred $ 0 $ (749,995)