v3.8.0.1
INCOME TAXES - Reconciliation between the effective tax rate and the statutory tax rate (Details)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Federal statutory rate 34.00% 34.00% 34.00%
State statutory rate, net of federal benefit 4.20% 4.10% 0.80%
Effect of foreign rates different from statutory 0.00% 0.00% (0.20%)
Change in state rate (6.2% to 0.95%) 0.00% 0.00% 3.80%
Change in federal rate (34% to 21%) 0.00% 0.00% (9.80%)
Nondeductible/nontaxable items (0.70%) (12.20%) (122.20%)
Change in valuation allowance (37.50%) (25.90%) 93.60%
Income tax expense (benefit) 0.00% 0.00% 0.00%