Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Accumulated other comprehensive income (loss) (Details)

v3.19.3.a.u2
Summary of Significant Accounting Policies - Accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Reclassification adjustment for (gains) losses on available-for-sale debt securities $ 13 $ (2,473)
Other (expense) income, net    
Reclassification adjustment for (gains) losses on available-for-sale debt securities $ (13) $ 2,473