Consolidated Statements of Stockholders’ Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Nil Coupon Perpetual Loan Notes [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2009	$ 242	$ 125,458	$ (47,828)	$ 269	$ 81		$ 78,222
Balance (in Shares) at Dec. 31, 2009	24,212,000
Net Income (Loss)			1,753				1,753
Foreign currency translation adjustments				(26)			(26)
Exercise of stock options		10					10
Exercise of stock options (in Shares)	1,000
Repurchase of nil coupon perpetual loan notes					(5)		(5)
Tax benefit from stock compensation expense							0
Stock compensation expense		4,274					4,274
Tax effect of expired vested options		(318)					(318)
Balance at Dec. 31, 2010	242	129,424	(46,075)	243	76		83,910
Balance (in Shares) at Dec. 31, 2010	24,213,000
Net Income (Loss)			6,148				6,148
Foreign currency translation adjustments				103			103
Unrealized gain (loss) on marketable securities, net of tax				35			35
Exercise of stock options	1	375					376
Exercise of stock options (in Shares)	81,000
Tax benefit from stock compensation expense		77					77
Stock compensation expense		2,810					2,810
Issuance of deferred shares of stock	1	(1)
Issuance of deferred shares of stock (in Shares)	51,000
Tax effect of expired vested options		(335)					(335)
Repurchases and retirement of common shares	(7)		(4,104)				(4,111)
Repurchases and retirement of common shares (in Shares)	(701,000)						2,306,590
Balance at Dec. 31, 2011	237	132,350	(44,031)	381	76		89,013
Balance (in Shares) at Dec. 31, 2011	23,644,000
Net Income (Loss)			2,776				2,776
Foreign currency translation adjustments				(765)			(765)
Unrealized gain (loss) on marketable securities, net of tax				(8)			(8)
Tax benefit from stock compensation expense							0
Stock compensation expense		1,248					1,248
Issuance of deferred shares of stock		58					58
Tax effect of expired vested options		(57)					(57)
Repurchases and retirement of common shares	(16)		(7,873)				(7,889)
Repurchases and retirement of common shares (in Shares)	(1,605,000)
Common shares issued upon vesting of restricted stock units		(101)					(101)
Common shares issued upon vesting of restricted stock units (in Shares)	72,000
Treasury shares withheld						(39)	(39)
Treasury shares withheld (in Shares)	(9,000)
Balance at Dec. 31, 2012	$ 221	$ 133,498	$ (49,128)	$ (392)	$ 76	$ (39)	$ 84,236
Balance (in Shares) at Dec. 31, 2012	22,102,000