Annual report pursuant to Section 13 and 15(d)

Contingencies and Commitments (Details Textual)

v3.8.0.1
Contingencies and Commitments (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
Future minimum annual royalties:  
Payments Due By Period, Less than one year $ 3,224
Royalty Agreement Terms [Member]  
Future minimum annual royalties:  
Payments Due By Period, Less than one year $ 50
Royalty Agreement Terms [Member] | Net sales [Member]  
Future minimum annual royalties:  
Royalty Percentage 1.00%
Royalty Agreement Terms [Member] | License fees [Member]  
Future minimum annual royalties:  
Royalty Percentage 21.00%
Royalty Agreement Terms [Member] | Sub-licensee net sales [Member]  
Future minimum annual royalties:  
Royalty Percentage 1.00%