UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Operating activities:
Net loss	$ (4,459,773)	$ (7,872,115)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,901,000	2,090,000
Depreciation expense	127,000	114,000
Provision for bad debts	0	33,000
Issuance of common stock for services	20,000	0
Changes in operating assets and liabilities:
Accounts receivable	(714,000)	(1,078,000)
Prepaid expenses and other current assets	(98,000)	(68,000)
Restricted cash	0	13,000
Accounts payable	(572,000)	101,000
Accrued liabilities	55,000	(116,000)
Other non-current liability	20,000	64,000
Deferred revenue	483,000	866,000
Net cash used in operating activities	(3,238,000)	(5,853,000)
Investing activities:
Purchase of property and equipment	(181,000)	(176,000)
Net cash used in investing activities	(181,000)	(176,000)
Financing activities:
Proceeds from June 2016 Public Offering, net of financing costs of $742	4,340,000	0
Payment of issuance costs related to March 2015 Private Placement	0	(18,000)
Capital lease payments	(18,000)	(17,000)
Net cash provided by/(used in) financing activities	4,322,000	(35,000)
Increase/(Decrease) in cash and cash equivalents.	903,000	(6,064,000)
Cash and cash equivalents, beginning of period	2,585,000	9,357,000
Cash and cash equivalents, end of period	$ 3,488,000	$ 3,293,000