CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Cash flows from operating activities:
Net loss	$ (5,397,000)	$ (4,461,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	385,000	273,000
Depreciation expense	12,000	16,000
Amortization expense		7,000
Change in fair value of warrant liability	364,000
Changes in assets and liabilities:
Accounts receivable	1,000	1,000
Inventories	8,000	24,000
Prepaid expenses and other assets	44,000
Accounts payable	(243,000)	617,000
Accrued expenses and other liabilities	600,000	(74,000)
Net cash used in operating activities	(4,226,000)	(3,597,000)
Cash flows from investing activities:
Purchases of property and equipment	(10,000)	(5,000)
Net cash used in investing activities	(10,000)	(5,000)
Cash flows from financing activities:
Proceeds from the issuance of common stock and warrants, net of issuance costs	4,444,000	3,583,000
Proceeds from exercises of stock options		18,000
Net cash provided by financing activities	4,444,000	3,601,000
Net increase (decrease) in cash and cash equivalents	208,000	(1,000)
Cash and cash equivalents at beginning of period	6,501,000	4,039,000
Cash and cash equivalents at end of period	$ 6,709,000	$ 4,038,000