Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future minimum lease payments under operating leases

Future minimum lease payments under operating leases having initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2017 are as follows:

2018	$	4,636,362
2019	3,570,048
2020	837,971
2021 and beyond	7,999
Total minimum operating lease payments	$	9,052,380

Schedule of multi-employer pension plans

		Certified Zone Status
Plan  Name:	EIN Number	Plan  Number	2017	2016	FIP Implemented	Surcharge Imposed	Expiration Date of Collective Bargaining Agreement
National Electrical Benefit Fund	53-0181657	001	Green	Green	Not applicable (green-zone plan)	Not applicable (green-zone plan)	August 31, 2019

Summary of committed expenditures

The following table presents the Company’s committed expenditures as of December 31, 2017:

2018	$	2,871,492
2019	369,069
2020	128,244
2021 and beyond	64,122
Total committed expenditures	$	3,432,927