UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Operating activities:
Net loss	$ (844,000)	$ (4,459,773)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	848,000	1,901,000
Depreciation expense	253,000	127,000
Issuance of common stock for services	15,000	20,000
Changes in operating assets and liabilities:
Accounts receivable	(669,000)	(714,000)
Prepaid expenses and other current assets	115,000	(98,000)
Accounts payable	124,000	(572,000)
Accrued liabilities	(320,000)	55,000
Other non-current liability	302,000	20,000
Deferred revenue	(1,059,000)	483,000
Net cash used in operating activities	(1,235,000)	(3,238,000)
Investing activities:
Purchase of property and equipment	(1,017,000)	(181,000)
Net cash used in investing activities	(1,017,000)	(181,000)
Financing activities:
Proceeds from June 2016 Public Offering, net of financing costs of $742	0	4,340,000
Proceeds from exercise of options	38,000	0
Capital lease payments	(19,000)	(18,000)
Net cash provided by financing activities	19,000	4,322,000
(Decrease)/Increase in cash and cash equivalents.	(2,233,000)	903,000
Cash and cash equivalents, beginning of period	3,295,000	2,585,000
Cash and cash equivalents, end of period	$ 1,062,000	$ 3,488,000