Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current
Cash	$ 1,975	$ 3,945
Short-term investments	5,002	6,004
Accounts receivable	588	680
Prepaid expenses	120	105
Investment tax credits receivable	219	436
Security deposits	201	205
Inventory	85	62
Total current assets	8,190	11,437
Leasehold improvements and equipment, net	4,864	5,213
Security deposits	257	252
Operating lease right-of-use-asset	878	1,003
Total assets	14,189	17,905
Current
Accounts payable and accrued liabilities	1,978	2,299
Current portion of operating lease liability	245	249
Current portion of finance lease liability	37	36
Deferred revenue	0	189
Convertible debentures	0	4,247
Total current liabilities	2,260	7,020
Long-term debt	5,500	2,500
Convertible notes	4,181	3,709
Operating lease liability	540	642
Finance lease liability	63	84
Deferred income tax liability	0	79
Total liabilities	12,544	14,034
Contingencies
Shareholders' equity
Capital stock, common shares, $0.00001 par value; 450,000,000 shares authorized; 174,072,512 shares issued and outstanding (2021: 154,571,289 common shares)	1	1
Additional paid-in capital	67,119	63,104
Accumulated deficit	(63,110)	(57,863)
Accumulated other comprehensive loss	(2,365)	(1,371)
Total shareholders' equity	1,645	3,871
Total liabilities and shareholders' equity	$ 14,189	$ 17,905