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7. Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Total debt $ 291,894 $ 301,424
Debt - current 0 11,103
Debt - long term 291,894 290,321
Wells Fargo Credit Facility    
Total debt 14,000 14,000
4.25% Convertible Notes    
Total debt 105,217 104,071
Treximet Secured Notes    
Total debt $ 172,677 $ 183,353