DEBT (Details)	9 Months Ended
	Oct. 31, 2012 USD ($)	Jan. 31, 2012 USD ($)	Oct. 31, 2012 Domestic and foreign unsecured lines of credit [Member] USD ($)	Oct. 31, 2012 Domestic unsecured line of credit [Member] USD ($)	Jan. 31, 2012 Domestic unsecured line of credit [Member] USD ($)	Oct. 31, 2012 Foreign unsecured line of credit [Member] USD ($)	Oct. 31, 2012 Foreign unsecured line of credit [Member] EUR (€)	Jan. 31, 2012 Foreign unsecured line of credit [Member] USD ($)	Jan. 31, 2012 Foreign unsecured line of credit [Member] EUR (€)
Line of Credit Facility [Line Items]
Available borrowing capacity under lines of credit			$ 4,388,740			$ 388,740	€ 300,000
Amount committed to standby letters of credit			600,596
Amount outstanding under lines of credit				0	0	16,171	12,479	265,581	202,997
Interest rate swap agreement [Abstract]
Term of interest rate swap (in years)	15 years
Variable rate basis	ninety-day LIBOR
Fixed interest rate (in hundredths)	4.87%
Effective fixed interest rate (in hundredths)	6.91%
Interest rate floor provision (in basis points)	250
Decrease in equity to date resulting from fair value of interest rate swap agreement	$ (211,719)	$ (230,760)