Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Funds (used) provided - Operating activities
Net loss	$ (2,588)	$ (2,264)
Depreciation of tangible assets	171	183
Stock-based compensation	86	50
Accretion expense	120	73
DSU expense	210
Lease expense	3
Total Adjustment	(1,998)	(1,958)
Changes in non-cash items related to operations:
Accounts receivable	141	(32)
Prepaid expenses	67	(172)
Investment tax credits receivable	(102)	(69)
Accounts payable and accrued liabilities	(501)	40
Net change in non-cash items related to operations	(395)	(233)
Net cash used in operating activities	(2,393)	(2,191)
Financing activities
Repayment of long-term debt	(159)	(187)
Proceeds from exercise of warrants and stock options	21	395
Net cash (used in) provided by financing activities	(138)	208
Investing activities
Additions to leasehold improvements and equipment	(70)	(438)
Redemption of short-term investments	3,731	1,515
Acquisition of short-term investments	(1,469)
Net cash provided by investing activities	2,192	1,077
Increase (decrease) in cash	(339)	(906)
Effect of foreign exchange on cash	151	(67)
Cash
Beginning of period	6,815	1,591
End of period	$ 6,627	$ 618

The aggregate amount of fixed and contingent rentals payable by the company and its subsidiaries.

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