XML 100 R5.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Consolidated Statements of Operations (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Consolidated Statements of Operations      
Nonvested stock amortization expenses $ 2,057 $ 2,231 $ 4,053