UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Operating activities:
Net income (loss)	$ (335)	$ 105
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock-based compensation	325	414
Depreciation and amortization expense	1,088	663
Net gain on disposal of equipment	0	(4)
Operating lease right-of use assets	542	519
Provision for doubtful accounts	130	117
Changes in operating assets and liabilities:
Accounts receivable	434	(1,321)
Prepaid expenses and other current assets	310	226
Accounts payable	1,737	1,506
Accrued liabilities	(743)	(320)
Other current liabilities	0	15
Other non-current liabilities	0	54
Operating lease liabilities	(511)	(406)
Deferred revenue	114	(124)
Net cash provided by operating activities	3,091	1,444
Investing activities:
Purchase of property and equipment	(1,358)	(1,473)
Net cash used in investing activities	(1,358)	(1,473)
Financing activities:
Proceeds from exercise of options	86	123
Net cash provided by financing activities	86	123
Increase in cash	1,819	94
Cash at beginning of period	9,007	4,687
Cash at end of period	$ 10,826	$ 4,781