Quarterly report pursuant to Section 13 or 15(d)

Investments (Details)

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Investments (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Nov. 22, 2011
Jun. 30, 2013
Nano Vibronix [Member]
Jun. 30, 2013
Nano Vibronix [Member]
Convertible Promissory Note [Member]
Nov. 22, 2011
Nano Vibronix [Member]
Convertible Promissory Note [Member]
Nano Vibronix Transaction [Abstract]            
Strategic investment $ 353 $ 345 [1]       $ 300
Interest rate on convertible promissory note (in hundredths)         10.00%  
Maturity date of convertible promissory note       Nov. 15, 2014    
Conversion into Series B-1 Participating Convertible Preferred Stock       $ 3,000    
Conversion price (in dollars per share)     $ 0.284 $ 0.284    
[1] Derived from the Company's audited consolidated financial statements.