SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Cash) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Cash and cash equivalents	$ 44,279	$ 40,087	$ 20,772	$ 20,538
Restricted cash	9,829	6,987	4,194	2,503
Total cash, cash equivalents, and restricted cash	$ 54,108	$ 47,074	$ 24,966	$ 23,041