Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v3.8.0.1
Fair Value Measurements (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Nonrecurring [Member]    
Assets    
Licensed technology (net) $ 3,890 $ 3,977
Goodwill 32,466 32,466
Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets    
Licensed technology (net) 0 0
Goodwill 0 0
Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets    
Licensed technology (net) 0 0
Goodwill 0 0
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Assets    
Licensed technology (net) 3,890 3,977
Goodwill 32,466 32,466
Nonrecurring [Member] | Licensed technology [Member]    
Liabilites    
Total gains (losses) 87 127
Nonrecurring [Member] | Goodwill [Member]    
Liabilites    
Total gains (losses) $ 0 0
Recurring [Member]    
Liabilites    
Contingent consideration   0
Recurring [Member] | Contingent Consideration [Member]    
Liabilites    
Total gains (losses)   1,391
Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Liabilites    
Contingent consideration   0
Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Liabilites    
Contingent consideration   0
Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Liabilites    
Contingent consideration   $ 0