Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Tax Credits (Details)

v3.7.0.1
INCOME TAXES - Tax Credits (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Tax credit carryforward    
Orphan drug and research and development credits $ 44,348 $ 36,387
Domestic country | Research    
Tax credit carryforward    
Amount of tax credit carryforward 33,000  
State jurisdiction | Research    
Tax credit carryforward    
Amount of tax credit carryforward $ 25,700