Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current
Cash	$ 6,121	$ 1,205
Short-term investments	6,008	1,038
Accounts receivable	518	260
Prepaid expenses	79	162
Investment tax credits receivable	781	635
Contract asset	0	354
Security deposits	210	407
Inventory	121	244
Total current assets	13,838	4,305
Leasehold improvements and equipment, net	5,651	5,851
Security deposits	259	252
Operating lease right-of-use asset	668	710
Total assets	20,416	11,118
Current
Accounts payable and accrued liabilities	2,182	1,989
Current portion of long-term debt	0	561
Current portion of operating lease liability	148	141
Current portion of finance lease liability	27	25
Loan payable	2,500	0
Deferred revenue	134	166
Convertible notes	0	1,486
Total current liabilities	4,991	4,368
Long-term debt	0	171
Convertible notes	2,631	1,505
Convertible debentures	5,437	5,461
Operating lease liability	445	482
Finance lease liability	72	84
Total liabilities	13,576	12,071
Shareholders' equity
Capital stock, common shares, $0.00001 par value; 450,000,000 shares authorized; 150,545,761 shares issued and outstanding (2020: 111,429,532 common shares) (note 10)	1	1
Additional paid-in capital	61,043	48,453
Accumulated deficit	(53,003)	(48,551)
Accumulated other comprehensive loss	(1,201)	(856)
Total shareholders' equity (deficit)	6,840	(953)
Total liabilities and shareholders' equity	$ 20,416	$ 11,118