SHORT-TERM AND LONG-TERM CREDIT (Details) (USD $)	3 Months Ended											12 Months Ended				12 Months Ended
	Jun. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Aug. 04, 2010 Until July 15, 2011	Aug. 04, 2010 July 16, 2011 to July 13, 2012	Mar. 07, 2011 Through July 13, 2012	Jul. 12, 2012 July 13, 2012 to May 01, 2014	Dec. 31, 2012 Revolving credit facility	Dec. 31, 2011 Revolving credit facility	May 02, 2000 Revolving credit facility	Dec. 31, 2012 Revolving credit facility Minimum	Dec. 31, 2012 Revolving credit facility Maximum	Dec. 31, 2012 Revolving credit facility Prime rate	Dec. 31, 2012 Revolving credit facility Base Rate	Dec. 31, 2012 Term loan	Dec. 31, 2011 Term loan	Aug. 04, 2010 Term loan	May 02, 2000 Term loan	Jun. 30, 2009 $600,000 term loan	Dec. 31, 2011 Term loan facility
SHORT-TERM AND LONG-TERM CREDIT
Term debt		$ 7,875,000	$ 8,925,000
Current portion		1,050,000	1,050,000
Long-term debt		6,825,000	7,875,000
Short-term and long-term credit
Maximum borrowing capacity					5,000,000	4,000,000	5,000,000	5,000,000			5,000,000
Amount borrowed																10,500,000	10,500,000	10,500,000	4,000,000	600,000
Interest rate (as a percent)															4.00%	6.50%
Base rate of interest on debt														prime rate
Basis spread on variable interest rate (as a percent)														1.00%
Facility fee (as a percent)												0.30%	0.375%
Outstanding amount of borrowings									2,400,000	2,400,000						7,900,000	8,900,000				8,900,000
Interest rate on revolving advances (as a percent)									4.25%	4.25%
Fair value of debt		8,479,000	9,690,000
Estimated market interest rate (as a percent)																4.25%	4.25%
Minimum quarterly consolidated trailing twelve month EBITDA	1,500,000
Working capital		2,000,000	1,400,000	(534,000)
Current ratio		1.35	1.28	0.91
The outstanding balance									$ 2,400,000	$ 2,400,000						$ 7,900,000	$ 8,900,000				$ 8,900,000