Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current
Cash	$ 6,815	$ 1,591
Short-term investments	4,180	3,313
Accounts receivable	815	623
Prepaid expenses	462	203
Investment tax credits receivable	416	314
Inventory	375
Total current assets	13,063	6,044
Leasehold improvements and equipment, net	6,248	6,346
Security deposits	707	757
Total assets	20,018	13,147
Current
Accounts payable and accrued liabilities	2,030	1,305
Current portion of long-term debt	692	772
Total current liabilities	2,722	2,077
Deferred lease obligations	49	50
Long-term debt	1,140	1,992
Convertible debentures	5,047	5,199
Convertible notes	1,073
Total liabilities	10,031	9,318
Commitments
Subsequent event	0	0
Shareholders' equity
Capital stock, common shares, $0.00001 par value; 200,000,000 shares authorized; 93,477,473 shares issued and outstanding (2017: 67,031,467 common shares)	1	1
Additional paid-in capital	42,048	25,253
Accumulated deficit	(30,896)	(20,788)
Accumulated other comprehensive loss	(1,166)	(637)
Total shareholders' equity	9,987	3,829
Total liabilities and shareholders' equity	$ 20,018	$ 13,147