LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS, LINE OF CREDIT FACILITY (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 75,000
Letters of Credit Outstanding, Amount	1,525
Maximum borrowing capacity	90,000
Reserve Against line of Credit	15,000
Line of Credit Facility, Average Outstanding Amount	$ 164
Line of Credit Facility, Interest Rate During Period	5.80%
Commitment fee (in hundredths)	0.50%
Line of Credit Facility, Current Borrowing Capacity	$ 49,728
Line of Credit Facility, Borrowing Capacity, Description	The maximum amount, less reserves, available for borrowing at levels below $30,000 are based on a sum of 45% of eligible receivables, 30% of eligible inventories and an additional amount of eligible equipment up to 20% of total borrowings under the facility. The maximum amount, less reserves, available for borrowing at levels above $30,000 are based on a sum of 75% of eligible receivables, 45% of eligible inventories and an additional amount of eligible equipment up to 20% of total borrowings under the facility.
Minimum [Member]
Line of Credit Facility [Line Items]
Commitment fee (in hundredths)	0.375%
Maximum [Member]
Line of Credit Facility [Line Items]
Commitment fee (in hundredths)	0.50%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)	3.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)	3.50%
Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)	2.00%
Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)	2.50%
Eurodollar [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)	1.00%
Federal funds rate [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)	0.50%