Statement of Changes in Redeemable Convertible Preferred Shares and Shareholders' Equity (Deficit) (USD $) In Thousands, except Share data	Total USD ($)	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Series E Preferred Stock [Member]	Preferred Stock [Member] Series A Preferred Stock [Member] USD ($)	Preferred Stock [Member] Series B Preferred Stock [Member] USD ($)	Preferred Stock [Member] Series E Preferred Stock [Member] USD ($)	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Comprehensive Income (Loss) [Member] USD ($)
Balance at Dec. 31, 2011	$ (86,316)				$ 2,939	$ 8,683	$ 90,866	$ 5,986	$ 28,772	$ (124,483)	$ 3,409
Balance (in Shares) at Dec. 31, 2011					1,151,468	994,885	4,322,126	132,422
Net income (loss)	(4,301)									(4,301)
Unrealized loss on marketable securities measured at fair value	(4)										(4)
Foreign currency translation adjustment	342										342
Stock option compensation expense	406								406
Issuance of subscription rights	8								8
Issuance of common shares on conversion of subscription rights								22	(22)
Issuance of common shares on conversion of subscription rights (in Shares)								6,472
Balance at Dec. 31, 2012	(89,865)				2,939	8,683	90,866	6,008	29,164	(128,784)	3,747
Balance (in Shares) at Dec. 31, 2012					1,151,468	994,885	4,322,126	133,069
Net income (loss)	12,032									12,032
Foreign currency translation adjustment	(1,236)										(1,236)
Stock option compensation expense	575								575
Issuance of subscription rights	73								73
Issuance of common shares on conversion of subscription rights								45	(45)
Issuance of common shares on conversion of subscription rights (in Shares)								5,602
Issued pursuant to exercise of stock options	49							94	(45)
Issued pursuant to exercise of stock options (in Shares)	8,329							8,329
Balance at Dec. 31, 2013	(78,372)				2,939	8,683	90,866	6,147	29,722	(116,752)	2,511
Balance (in Shares) at Dec. 31, 2013	6,468,479	1,151,468	994,885	4,322,126	1,151,468	994,885	4,322,126	1,344,627
Net income (loss)	13,018									13,018
Conversion of series A, B and E convertible preferred shares	102,488				(2,939)	(8,683)	(90,866)	102,488
Conversion of series A, B and E convertible preferred shares (in Shares)					(1,151,468)	(994,885)	(4,322,126)	7,725,924
Issuance of common shares, net of issuance costs	38,373							38,373
Issuance of common shares, net of issuance costs (in Shares)								5,095,000
Foreign currency translation adjustment	(3,501)										(3,501)
Stock option compensation expense	760								760
Issuance of common shares on conversion of subscription rights								124	(124)
Issuance of common shares on conversion of subscription rights (in Shares)								13,365
Issued pursuant to exercise of stock options	13							25	(12)
Issued pursuant to exercise of stock options (in Shares)	2,417							2,417
Balance at Dec. 31, 2014	$ 72,779							$ 147,157	$ 30,346	$ (103,734)	$ (990)
Balance (in Shares) at Dec. 31, 2014		0	0	0				14,181,333