Annual report pursuant to Section 13 and 15(d)

Income Taxes (NOL) (Details)

v3.20.4
Income Taxes (NOL) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Operating Loss Carryforwards  
NOL, offset future federal taxable income $ 241,000
NOL, carried forward indefinitely 1,000
AMT credits 727
Federal  
Operating Loss Carryforwards  
NOL carryforwards 242,000
Federal | Research and development  
Operating Loss Carryforwards  
Tax credit carryforward 26,958
State  
Operating Loss Carryforwards  
NOL carryforwards 211,000
State | Research and development  
Operating Loss Carryforwards  
Tax credit carryforward 11,799
Foreign  
Operating Loss Carryforwards  
Tax credit carryforward $ 886
Minimum  
Operating Loss Carryforwards  
AMT credits refundable 50.00%
Maximum  
Operating Loss Carryforwards  
AMT credits refundable 100.00%