Annual report pursuant to Section 13 and 15(d)

Cash and Cash Equivalents (Details)

v3.19.3.a.u2
Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Cash and cash equivalents [Abstract]    
Cost or Amortized Cost $ 156,307 $ 113,757
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Estimated Fair Value 156,307 113,757
Cash    
Cash and cash equivalents [Abstract]    
Cost or Amortized Cost 149,508 107,118
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Estimated Fair Value 149,508 107,118
Money Market Funds    
Cash and cash equivalents [Abstract]    
Cost or Amortized Cost 6,799 6,639
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Estimated Fair Value $ 6,799 $ 6,639