Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2010	$ 98,847	$ 99,658	$ 4,838	$ (10,901)	$ 5,252
Beginning Balance, Shares at Dec. 31, 2010		16,300,041
Shares issued upon exercise of employee stock options	83	88	(5)
Shares issued upon exercise of employee stock options, Shares		31,200
Net loss	(14,013)			(14,013)
Other comprehensive income (loss)	(445)				(445)
Share-based compensation (note 7)	501		501
Ending Balance at Dec. 31, 2011	84,973	99,746	5,334	(24,914)	4,807
Ending Balance, Shares at Dec. 31, 2011		16,331,241
Shares issued upon exercise of employee stock options	151	208	(57)
Shares issued upon exercise of employee stock options, Shares	68,000	68,000
Net loss	(35,975)			(35,975)
Other comprehensive income (loss)	77				77
Share-based compensation (note 7)	431		431
Ending Balance at Dec. 31, 2012	49,657	99,954	5,708	(60,889)	4,884
Ending Balance, Shares at Dec. 31, 2012		16,399,241
Shares issued upon exercise of employee stock options	332	473	(141)
Shares issued upon exercise of employee stock options, Shares	66,000	66,000
Net loss	(23,217)			(23,217)
Other comprehensive income (loss)	(8,649)				(8,649)
Share-based compensation (note 7)	270		270
Ending Balance at Dec. 31, 2013	$ 18,393	$ 100,427	$ 5,837	$ (84,106)	$ (3,765)
Ending Balance, Shares at Dec. 31, 2013		16,465,241