Property and equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and equipment

4. Property and equipment

	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
	DECEMBER 31, 2016
(in thousands)	COST		ACCUMULATED AMORTIZATION		NET BOOK VALUE
Leasehold improvements	$	490	$	77	$	413
Office furniture, equipment and systems		534		98		436
	$	1,024	$	175	$	849