Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands |
6 Months Ended | |
---|---|---|
Jun. 30, 2018 |
Jul. 12, 2018 |
|
Loss Contingencies [Line Items] | ||
Percentage of royalty obligations, majority are less than | 3.00% | |
Minimum | ||
Loss Contingencies [Line Items] | ||
Percentage of royalty obligations | 0.50% | |
Maximum | ||
Loss Contingencies [Line Items] | ||
Percentage of royalty obligations | 5.00% | |
Subsequent Event | Threatened Litigation | ||
Loss Contingencies [Line Items] | ||
Estimate of potential loss from litigation | $ 510 |