CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net income	$ 67,411	$ 21,969
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for (recovery of) doubtful accounts	42,938	(3,653)
Depreciation of equipment and leasehold improvements	125,748	131,359
Stock-based compensation expense	96,801	83,041
Deferred income taxes	0	58,846
Change in cash surrender value of life insurance	(24,449)	(172,382)
Change in deferred revenue	(113,104)	(95,002)
Change in deferred compensation accrual	43,988	45,906
Deferred compensation paid	37,500	37,500
Net changes in operating assets and liabilities (see note 11)	505,956	64,259
Cash provided by operating activities	707,789	96,843
Investing activities:
Purchase of equipment and leasehold improvements	(14,790)	(157,242)
Life insurance premiums paid	(122,754)	(130,736)
Cash (used in) investing activities	(137,544)	(287,978)
Financing activities:
Proceeds from exercise of stock options	46,677	0
Cash provided by financing activities	46,677	0
Net increase (decrease) in cash and cash equivalents	616,922	(191,135)
Cash and cash equivalents at beginning of period	1,081,533	432,283
Cash and cash equivalents at end of period	$ 1,698,455	$ 241,148