DEBT (Details) - USD ($) $ in Thousands	Jun. 02, 2015	Apr. 30, 2015	Jun. 30, 2015	Apr. 29, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Line of credit			$ 28,543		$ 4,640
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt			1,000
Long-term debt, current portion			387		373
Long-term debt, net of current portion			309		$ 506
Wells Fargo Bank | Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 20,000
Line of credit				9,300
Early termination fee				100
BMO Harris Bank | Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				70,000
Line of credit			$ 28,543
Line of credit facility, current borrowing capacity				50,000
Increments for additional borrowing				5,000
Letters of credit, maximum allowed				5,000
Borrowing base, as percentage of eligible accounts receivables less reserves		85.00%
Description of variable rate basis	one-month LIBOR	one, two, three or six-month LIBOR
Monthly unused fee, rate per annum		0.25%
Fixed charge coverage ratio		1.10
Maximum limit for non-financed capital expenditures during 2015				10,500
Maximum limit for non-financed capital expenditures after 2015				$ 10,000
Minimum | BMO Harris Bank | Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%
Maximum | BMO Harris Bank | Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.50%