XML 31 R31.htm IDEA: XBRL DOCUMENT v3.19.3
Investments - Amortized Cost and Fair Value of AFS Securities and Corresponding Amounts of Gross Unrealized Gains And Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Amortized cost and fair value of available-for-sale securities and gross unrealized gains and losses [Abstract]    
Amortized Cost $ 7,607 $ 4,812
Gross Unrealized Gains 246 168
Gross Unrealized Losses (12) (23)
Estimated Fair Value 7,841 4,957
Treasury bills    
Amortized cost and fair value of available-for-sale securities and gross unrealized gains and losses [Abstract]    
Amortized Cost 52  
Gross Unrealized Gains 0  
Gross Unrealized Losses 0  
Estimated Fair Value 52  
Municipal bonds    
Amortized cost and fair value of available-for-sale securities and gross unrealized gains and losses [Abstract]    
Amortized Cost 3,202 3,218
Gross Unrealized Gains 182 122
Gross Unrealized Losses (1) (23)
Estimated Fair Value 3,383 3,317
Agency mortgage-backed securities    
Amortized cost and fair value of available-for-sale securities and gross unrealized gains and losses [Abstract]    
Amortized Cost 4,353 1,594
Gross Unrealized Gains 64 46
Gross Unrealized Losses (11) 0
Estimated Fair Value $ 4,406 $ 1,640