Annual report pursuant to Section 13 and 15(d)

DEFINED CONTRIBUTION PLAN (Details Textual)

v3.8.0.1
DEFINED CONTRIBUTION PLAN (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Defined Contribution Benefit Plans [Line Items]      
Defined Contribution Plan Maximum Employee Contribution As Percentage Of Base Salary 60.00%    
Defined Benefit Plan, Contributions by Employer $ 1.9 $ 1.9 $ 1.9
First Five Percent Of Each Participants Contributions [Member]      
Defined Contribution Benefit Plans [Line Items]      
Defined Contribution Plan Employer Matching Contribution To Employee Contribution 50.00%    
Defined Contribution Plan Employee Contributions Percentage Of Eligible Compensation 5.00%