LONG-TERM OBLIGATIONS (Detail Textuals) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 21, 2011	Apr. 06, 2010
Line of Credit Facility [Line Items]
Non-cancelable operating lease obligations	1,156
First Tennessee Bank National Association | Revolving credit facility
Line of Credit Facility [Line Items]
Unsecured revolving credit facility		$ 25,000,000	$ 20,000,000
Description of reference rate basis	LIBOR Market Index Rate
Variable interest rate in addition to reference rate	1.50%
Interest rate	1.70%
First Tennessee Bank National Association | Revolving credit facility | Minimum
Line of Credit Facility [Line Items]
Non-usage fee for current loan agreement in annual amount percentage	0.15%
First Tennessee Bank National Association | Revolving credit facility | Maximum
Line of Credit Facility [Line Items]
Non-usage fee for current loan agreement in annual amount percentage	0.35%