CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Operating activities:
Net income	$ (5,335,000)	$ 548,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Stock-based compensation expense	864,000	912,000
Depreciation and amortization expense	2,246,000	1,627,000
Net gain on disposal of equipment	0	(4,000)
Operating lease right-of-use assets	952,000	786,000
Asset impairment	807,000	0
Allowance for doubtful accounts	195,000	292,000
Changes in operating assets and liabilities:
Accounts receivable	1,308,000	(2,818,000)
Prepaid expenses and other current assets	(184,000)	(187,000)
Accounts payable	2,465,000	974,000
Accrued liabilities	(145,000)	183,000
Operating lease liabilities	(907,000)	(631,000)
Deferred revenue	1,706,000	4,815,000
Net cash provided by operating activities	3,972,000	6,497,000
Investing activities:
Purchase of property and equipment	(2,872,000)	(2,384,000)
Net cash used in investing activities	(2,872,000)	(2,384,000)
Financing activities:
Proceeds from exercise of options	85,000	207,000
Repurchases of common stock	(74,000)	0
Net cash provided by financing activities	11,000	207,000
Increase in cash	1,111,000	4,320,000
Cash, beginning of year	9,007,000	4,687,000
Cash, end of year	10,118,000	9,007,000
Non-cash financing and investing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	$ 231,000	$ 205,000