ACCRUED PAYROLL AND EXPENSES AND CONTINGENT CONSIDERATION - Accrued Payroll and Expenses (Details) - USD ($)	Apr. 01, 2018	Dec. 31, 2017
Accrued Liabilities, Current [Abstract]
Temporary worker payroll	$ 5,816,993	$ 5,124,908
Temporary worker payroll related	1,835,776	2,454,539
Accrued bonuses and commissions	1,105,074	1,172,497
Other	2,452,473	2,788,862
Accrued liabilities, current	$ 11,210,316	$ 11,540,806