DEBT OBLIGATIONS AND COLLATERAL REQUIREMENTS (Details) - USD ($)		12 Months Ended
	May 01, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 10,000,000
Option to increase borrowing capacity		$ 50,000,000
Letters of credit, maximum effective in force period		1 year
Performance bond commitments		$ 10,900,000
Letter of credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		5,000,000
Forth Amended Credit Agreement | Revolving credit facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, variable rate	1.15%
Unsecured Credit Agreement | Covenant Requirement
Debt Instrument [Line Items]
Consolidated tangible net worth required	$ 36,000,000
Consolidated leverage ratio	150.00%
Unsecured Credit Agreement | Letter of credit
Debt Instrument [Line Items]
Credit facility, available borrowing capacity		4,800,000
Unsecured Credit Agreement | Revolving credit facility
Debt Instrument [Line Items]
Credit facility, outstanding letters of credit		200,000
Credit facility, available borrowing capacity		9,800,000
Credit card
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 1,000,000.0