Property and equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property and equipment

4. Property and equipment

	DECEMBER 31, 2018
(in thousands)	COST		ACCUMULATED AMORTIZATION		NET BOOK VALUE
Leasehold improvements	$	490	$	248	$	242
Office furniture, equipment and systems		353		195		158
	$	843	$	443	$	400

	DECEMBER 31, 2017
(in thousands)	COST		ACCUMULATED AMORTIZATION		NET BOOK VALUE
Leasehold improvements	$	715	$	259	$	456
Office furniture, equipment and systems		725		276		449
	$	1,440	$	535	$	905