Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current
Cash	$ 6,627	$ 6,815
Short-term investments	2,005	4,180
Accounts receivable	674	815
Prepaid expenses	395	462
Investment tax credits receivable	518	416
Inventory	383	375
Total current assets	10,602	13,063
Leasehold improvements and equipment, net	6,279	6,248
Security deposits	722	707
Operating lease right-of-use asset	722
Total assets	18,325	20,018
Current
Accounts payable and accrued liabilities	1,741	2,030
Current portion of long-term debt	725	692
Current portion of operating lease liability	131
Total current liabilities	2,597	2,722
Deferred lease obligations		49
Long-term debt	987	1,140
Convertible debentures	5,231	5,047
Convertible notes	1,114	1,073
Operating lease liability	594
Total liabilities	10,523	10,031
Shareholders' equity
Capital Stock, common shares, $0.00001 par value; 200,000,000 shares authorized; 93,527,473 shares issued and outstanding (2018: 93,477,473 common shares)	1	1
Additional paid-in capital	42,155	42,048
Accumulated deficit	(33,435)	(30,896)
Accumulated other comprehensive loss	(919)	(1,166)
Total Shareholders' Equity	7,802	9,987
Total liabilities and shareholders' equity	$ 18,325	$ 20,018