Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current
Cash	$ 3,728	$ 6,815
Short-term investments	561	4,180
Accounts receivable	197	815
Prepaid expenses	184	462
Investment tax credits receivable	283	416
Inventory	386	375
Total current assets	5,339	13,063
Leasehold improvements and equipment, net	6,310	6,248
Security deposits	728	707
Operating lease right-of-use asset	690
Total assets	13,067	20,018
Current
Accounts payable and accrued liabilities	1,729	2,030
Current portion of long-term debt	713	692
Current portion of operating lease liability	135
Total current liabilities	2,577	2,722
Deferred lease obligations		49
Long-term debt	639	1,140
Convertible debentures	5,445	5,047
Convertible notes	1,205	1,073
Operating lease liability	562
Total liabilities	10,428	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	42,330	42,048
Accumulated deficit	(38,846)	(30,896)
Accumulated other comprehensive loss	(846)	(1,166)
Total shareholders' equity	2,639	9,987
Total liabilities and shareholders' equity	$ 13,067	$ 20,018