Note 4 - Cash, Cash Equivalents, and Restricted Cash

3 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Cash and Cash Equivalents Disclosure [Text Block]

4.

Cash, cash equivalents, and restricted cash

Cash, cash equivalents, and restricted cash consists of the following:

(in thousands)	March 31, 2020		December 31, 2019
Cash	$	17,445	$	12,041
Cash equivalents:
U.S. Government money market funds		26,024		14,971
Tri-party reverse repurchase agreements (collateralized by at least 102% U.S. Treasury and Agency Securities)		123,016		154,258
Restricted cash, non-current		100		100
Total cash, cash equivalents, and restricted cash	$	166,585	$	181,370