Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities:
Net income	$ 1,593,269	$ 3,902,406
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	803,002	601,433
Amortization of operating right of use asset	81,604	0
Stock compensation expense	399,681	551,881
Bad debt expense	800,000	510,000
Decrease (increase) in:
Trade receivables	(205,718)	312,283
Long-term receivables, prepaids and other assets	1,279,674	(383,703)
Increase (decrease) in:
Accounts payable	(122,797)	(960,140)
Accrued liabilities	(278,255)	462,194
Operating lease liability	(81,605)	0
Deferred revenue	(72,716)	(417,499)
Net cash provided by operating activities	4,196,139	4,578,855
Cash Flows From Investing Activities:
Purchase of property and equipment	(650,422)	(1,447,880)
Sale of long-term investments	0	477,884
Net cash used in investing activities	(650,422)	(969,996)
Cash Flows From Financing Activities:
Proceeds from employee stock purchase plans	120,923	0
Proceeds from exercise of options and warrants	0	164,997
Proceeds from issuance of notes payable	1,109,350	1,268,959
Net increase in lines of credit	0	1,430,000
Dividends paid	(586,444)	(439,833)
Common stock buy-back	(2,158,471)	(482,406)
Payments on notes payable and capital leases	(295,168)	(1,833,592)
Net cash provided by (used in) financing activities	(1,809,810)	108,125
Net increase in cash and cash equivalents	1,735,907	3,716,984
Cash and cash equivalents at beginning of period	18,609,423	14,892,439
Cash and cash equivalents at end of period	20,345,330	18,609,423
Supplemental Disclosure of Cash Flow Information:
Cash paid for income taxes	100,158	76,063
Cash paid for interest	16,042	146,889
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Common stock to pay accrued liabilities	396,989	514,286
Dividends accrued on preferred stock	586,444	586,443
Right-of-use asset	$ 862,741	$ 0