XML 68 R54.htm IDEA: XBRL DOCUMENT v3.10.0.1
INCOME TAXES - Reconciliation of beginning and ending amount of unrecognized tax benefits (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Balance at January 1 $ 243,000 $ 15,000
Additions based on tax positions related to the current year 81,000 12,000
Additions for tax positions of prior years 69,000 216,000
Balance at December 31 $ 393,000 $ 243,000