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Investment in Cornerstone Pharmaceuticals, Inc. (Details) - USD ($)
$ in Thousands
 1 Months Ended 6 Months Ended 12 Months Ended
Jan. 04, 2017
Sep. 30, 2016
Jan. 31, 2017
Jan. 31, 2016
Jul. 31, 2016
Apr. 14, 2016
Mar. 23, 2016
Jan. 21, 2016
Investment In Cornerstone Pharmaceuticals, Inc. (Textual)                
Proceeds from issuance of member interests     $ 10,000   $ 8,800      
Purchase price     1,250        
Howard S. Jonas [Member]                
Investment In Cornerstone Pharmaceuticals, Inc. (Textual)                
Percentage of direct and indirect interest 10.00%              
Purchase price $ 1,000              
Cornerstone Pharmaceuticals, Inc. [Member]                
Investment In Cornerstone Pharmaceuticals, Inc. (Textual)                
Initial amount of investment funded upon signing the Subscription and Loan Agreement     2,000          
Convertible promissory note, principal amount     $ 2,000          
Convertible promissory note, rate of interest     3.50%          
Initial amount of investment amounts paid           $ 1,450 $ 50 $ 500
Maximum amount of investment     $ 10,000          
Investments     10,000   $ 2,000      
Maximum exposure to loss     $ 10,000          
Proceeds from third party member interests, description     At July 31, 2016, the $8.8 million received was included in "Other current liabilities" in the accompanying consolidated balance sheet pending the issuance of the member interests.          
Cornerstone Pharmaceuticals, Inc. [Member] | Convertible promissory note [Member] | Howard and Deborah Jonas [Member]                
Investment In Cornerstone Pharmaceuticals, Inc. (Textual)                
Series C Convertible notes     $ 525          
Cornerstone Pharmaceuticals, Inc. [Member] | Convertible promissory note [Member] | The Howard S. and Deborah Jonas Foundation [Member]                
Investment In Cornerstone Pharmaceuticals, Inc. (Textual)                
Series C Convertible notes     525          
CS Pharma Holdings, LLC [Member]                
Investment In Cornerstone Pharmaceuticals, Inc. (Textual)                
Maximum amount of investment     $ 10,000          
Holds percentages of interest     50.00%          
CS Pharma Holdings, LLC [Member] | Convertible promissory note ("Series D Note") [Member]                
Investment In Cornerstone Pharmaceuticals, Inc. (Textual)                
Convertible promissory note, principal amount   $ 10,000            
Convertible promissory note, rate of interest   3.50%            
Convertible promissory note, maturity date   Sep. 16, 2018            
Remaining amount of investment funded   $ 8,000            
Purchase shares of capital stock percentage     56.00%          
Exercise warrants value     $ 10,000          
Initial amount of investment amounts paid     $ 5,000          
Convertible notes conversion features, description     The Series D Note also includes a mandatory conversion into Cornerstone common stock upon a qualified initial public offering, and conversion at the holder's option upon an unqualified financing event. In all cases, the Series D Note conversion price is based on the applicable financing purchase price.          
Warrants expiry date     Dec. 31, 2020          
Warrant, description     The exercise price of the warrant is the lower of 70% of the price sold in an equity financing, or $1.25 per share, subject to certain adjustments. The minimum initial and subsequent exercises of the warrant shall be for such number of shares that will result in at least $5 million of gross proceeds to Cornerstone, or such lesser amount as represents 5% of the outstanding capital stock of Cornerstone, or such lesser amount as may then remain unexercised. The warrant will expire upon the earlier of December 31, 2020 or a qualified initial public offering or liquidation event.