XML 59 R41.htm IDEA: XBRL DOCUMENT v3.19.1
Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2018
Fair Value Disclosures [Abstract]  
Schedule of fair value of financial instruments by level in hierarchy The following table summarizes the fair value of these marketable securities by level within the fair value hierarchy:
December 31, 2018December 31, 2017
Level 1Level 2TotalLevel 1Level 2Total
U.S. Treasury notes and bonds$5,034,955 $— $5,034,955 $— $— $— 
U.S. Agency issued mortgage-backed securities - variable rate— — — — 3,539,102 3,539,102 
U.S. Agency notes and bonds - fixed rate— — — — 198,293 198,293 
Corporate bonds— 2,504,551 2,504,551 
SBA loan pools - variable rate— — — — 935,081 935,081 
Short-term cash investments— 751,173 751,173 — — — 
Total fair value of marketable securities$5,034,955 $3,255,724 $8,290,679 $— $4,672,476 $4,672,476