XML 52 R36.htm IDEA: XBRL DOCUMENT v3.20.4
Credit Losses (Tables)
12 Months Ended
Dec. 31, 2020
Credit Loss [Abstract]  
Accounts receivable, allowance for credit loss The following table summarizes the changes in allowance for credit losses on our accounts receivables, certain non-trade accounts receivable and contract assets for the year ended December 31, 2020 (in thousands):
Balance as of December 31, 2019$(41)
Passport acquisition(2,582)
Cumulative transition adjustment(2,815)
Provision for credit losses(3,283)
Charge-offs1,665 
Balance as of December 31, 2020$(7,056)
Held-to-maturity securities, amortized cost and interest income
The amortized cost of our investments as of December 31, 2020 and 2019 and interest income for the years ended December 31, 2020 and 2019 were as follows (in thousands):
Amortized CostInterest Income for the Year Ended
December 31,
December 31, 2020December 31, 201920202019
U.S. Treasury bills$8,909 $10,784 $239 $249 
Corporate bonds1,707 1,705 524 49 
Collateralized mortgage obligations3,433 5,472 339 112 
Corporate stock130 — — — 
Yankees598 597 21 21 
Total investments$14,777 $18,558 $1,123 $431