XML 24 R14.htm IDEA: XBRL DOCUMENT

Marketable Securities	9 Months Ended
Marketable Securities	Sep. 30, 2018
Marketable Securities [Abstract]
Marketable Securities	Note 7 – Marketable Securities The Company’s current investment policy is to invest in cash, certificates of deposit, U.S. Treasury securities, U.S. government agency obligations and money market funds invested in U.S. government securities. Marketable securities of $27,262 and $42,917 as of September 30, 2018 and December 31, 2017, respectively, consisted of U.S. Treasury securities held to maturity and certificates of deposit with original maturities of greater than 90 days and up to one year. Due to the short-term nature of these securities and their low interest rates, there is no material difference between their fair market values and amortized costs.