Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current
Cash	$ 1,332	$ 6,815
Short-term investments	580	4,180
Accounts receivable	381	815
Prepaid expenses	170	462
Investment tax credits receivable	375	416
Inventory	382	375
Total current assets	3,220	13,063
Leasehold improvements and equipment, net	6,365	6,248
Security deposits	752	707
Operating lease right-of-use-asset	683
Total assets	11,020	20,018
Current
Accounts payable and accrued liabilities	1,941	2,030
Current portion of long-term debt	727	692
Current portion of operating lease liability	137
Convertible debentures	5,642
Total current liabilities	8,447	2,722
Deferred lease obligations		49
Long-term debt	470	1,140
Convertible debentures		5,047
Convertible notes	1,255	1,073
Operating lease liability	555
Total liabilities	10,727	10,031
Commitments
Subsequent event
Shareholders' equity
Capital stock, common shares, $0.00001 par value; 200,000,000 shares authorized; 93,942,652 shares issued and outstanding (2018: 93,477,473 common shares)	1	1
Additional paid-in capital	42,635	42,048
Accumulated deficit	(41,507)	(30,896)
Accumulated other comprehensive loss	(836)	(1,166)
Total shareholders' equity	293	9,987
Total liabilities and shareholders' equity	$ 11,020	$ 20,018