5. REVOLVING CREDIT FACILITY, NOTES PAYABLE AND CAPITAL LEASES (Details Narrative) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Total credit facilities outstanding	$ 0	$ 0
Total line of credit available	117,500
Discounts on term loans	15,951	18,470
Deferred financing costs, net	1,500	1,900
Revolving Credit Facility [Member]
Total credit facilities outstanding	0
Total line of credit available	111,200
Deferred financing costs, net	1,500
Letter of credit reserve	$ 6,300
Effective interest rate	7.75%
Debt maturity date	Jul. 01, 2021
First Lien Term Loans [Member]
Term loans net	$ 579,500
Discounts on term loans	$ 15,900
Amendment No. 5 to Credit Agreement [Member]
Deferred financing costs, net		350
Proceeds from term loans		170,000
Debt issuance costs		4,700
Debt discount		4,100
Amortization of deferred issuance costs		235
Amendment No. 4 to Credit Agreement [Member]
Deferred financing costs, net		$ 543