Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
United States - Federal tax [Abstract]
Current	$ 2,752,000		$ 246,000		$ 3,232,000
Deferred	(1,572,000)		(5,495,000)		1,394,000
United States - State tax [Abstract]
Current	315,000		0		457,000
Deferred:	(2,074,000)		(243,000)		61,000
Israel [Abstract]
Current	4,034,000		3,487,000		580,000
Deferred	(50,000)		(17,000)		563,000
United Kingdom [Abstract]
Current	1,371,000		0		0
Deferred	(338,000)		0		0
Income tax expense (benefit)	4,438,000		(2,022,000)		6,287,000
Statutory income tax rate (in hundredths)	34.00%
Statutory income tax rate for state and local (in hundredths)	6.50%
Net income before tax [Abstract]
U.S	3,152,000		16,309,000		12,386,000
Israel	20,414,000		13,980,000		5,502,000
U.K.	3,365,000		0		0
Total	26,931,000		2,329,000		17,888,000
Tax rate (in hundredths)	40.50%		40.50%		40.50%
Income tax expense (benefit) [Abstract]
Theoretical Federal and State expense (benefit)	10,907,000		943,000		7,244,000
Decrease in taxes resulting from differences in tax rates, net	5,539,000		4,249,000		869,000
Increase in taxes from permanent differences in stock-based compensation	737,000		3,109,000		158,000
Decrease in tax position from prior years	(2,325,000)		0		0
Other	658,000	[1]	61,000	[1]	246,000	[1]
Income tax expense (benefit)	4,438,000		(2,022,000)		6,287,000
Operating Loss Carryforwards [Line Items]
Period for utilization of operating loss carryforward	5 years
Loss carryforwards recognized in the deferred tax account	20,680,000		28,167,000
Photo Therapeutics Ltd [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	12,000,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	48,000,000
Income tax examination	2009 through 2012
Loss carryforwards recognized in the deferred tax account	19,300,000
UK [Member]
Operating Loss Carryforwards [Line Items]
Percentage of valuation allowance applied to net operating loss carryforwards (in hundredths)	100.00%
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax asset	974,000
Income tax examination	2005 through 2012
Operating loss carryforwards, valuation allowance	$ 120
Operating loss carryforwards expiration	through 2017 to 2032

[1] Resulting mainly in 2011 and 2010 from the changes in the exchange rate of Israeli currency relative to the US dollar. Resulting in 2012, substantially to the use of loss carryforwards.