Quarterly report pursuant to Section 13 or 15(d)

Investments (Details)

v2.4.0.6
Investments (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 6 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2012
Mar. 31, 2012
Sep. 30, 2012
Nano Vibronix [Member]
Sep. 30, 2012
Nano Vibronix [Member]
Convertible promissory note [Member]
Nov. 22, 2011
Nano Vibronix [Member]
Convertible promissory note [Member]
Sep. 30, 2012
Sequel Power LLC [Member]
Mar. 31, 2011
Sequel Power LLC [Member]
Jan. 14, 2011
Sequel Power LLC [Member]
Nano Vibronix Transaction [Abstract]                
Strategic investment $ 329 $ 312     $ 300      
Interest rate on convertible promissory note (in hundredths)       10.00%        
Maturity date of convertible promissory note     Nov. 24, 2014          
Conversion into Series B-1 Participating Convertible Preferred Stock     3,000          
Conversion price (in dollars per share)     $ 0.284          
Sequel Power Transaction [Abstract]                
Cash contribution towards economic interest           2,000    
Economic interest (in hundredths)           25.00%    
Warrants outstanding to purchase shares of common stock (in shares) 285,454         137,466   185,777
Exercise price of warrants (in dollars per share)               $ 3.15
Exercisable period for warrants           4 years    
Warrants transferred to purchase shares of common stock (in shares)           48,311    
Results of Sequel Power Operations [Abstract]                
Solar development model value           1,377   1,730
Estimated useful life of solar development model             10 years  
Intangible assets value           $ 0