UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Operating activities:
Net (loss) income	$ (334)	$ 750
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Stock-based compensation	208	163
Issuance of common stock for services	0	8
Depreciation and amortization expense	360	269
Gain on disposal of equipment	(52)	0
Operating lease right-of use assets	198	0
Provision for doubtful accounts	34	0
Deferred rent	0	216
Changes in operating assets and liabilities:
Accounts receivable	425	(786)
Prepaid expenses and other current assets	(55)	25
Accounts payable	(341)	(141)
Accrued liabilities	(339)	(228)
Operating lease liabilities	(147)	0
Deferred revenue	124	124
Net cash provided by operating activities	81	400
Investing activities:
Purchase of property and equipment	(522)	(486)
Net cash used in investing activities	(522)	(486)
Financing activities:
Proceeds from exercise of options and warrants	2	1,076
Finance lease payments	(14)	(40)
Net cash (used in) provided by financing activities	(12)	1,036
(Decrease)/increase in cash	(453)	950
Cash at beginning of period	3,237	1,006
Cash at end of period	2,784	1,956
Non-cash investing activities:
Purchase equipment under finance lease	0	235
Purchase of equipment	160	0
Unpaid portion of property and equipment purchase	$ 321	$ 0