INVESTMENTS (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 7,560,000		$ 7,560,000		$ 8,253,000
Gross Unrealized Gain	78,000		78,000		41,000
Gross Unrealized (Loss)	0		0		0
Fair Value	7,638,000		7,638,000		8,294,000
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	36,718,000		36,718,000		36,837,000
Gross Unrecognized Gain	211,000		211,000		202,000
Gross Unrecognized (Loss)	(23,000)		(23,000)		(32,000)
Fair Value	36,906,000		36,906,000		37,007,000
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Other-than-temporary impairment	0		0		0
Unrealized gain (loss) on available-for-sale investments, net of related income taxes	46,000		46,000		25,000
Redemptions of investments	0	250,000	717,000	13,300,000
Available-for-sale investments by stated maturity, amortized cost [Abstract]
Amortized Cost, Due in less than one year	1,029,000		1,029,000		670,000
Amortized Cost, Due in 1 to 4 years	6,531,000		6,531,000		7,583,000
Amortized Cost, Total investments	7,560,000		7,560,000		8,253,000
Available-for-sale investments by stated maturity, fair value [Abstract]
Fair Value, Due in less than one year	1,032,000		1,032,000		670,000
Fair Value, Due in 1 to 4 years	6,606,000		6,606,000		7,624,000
Fair Value, Total investments	7,638,000		7,638,000		8,294,000
Held-to-maturity investments by stated maturity, amortized cost [Abstract]
Amortized Cost, Due in less than one year	21,612,000		21,612,000		21,019,000
Amortized Cost, Due in 1 to 4 years	15,106,000		15,106,000		15,818,000
Amortized Cost, Total investments	36,718,000		36,718,000		36,837,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Due in less than one year	21,669,000		21,669,000		21,062,000
Fair Value, Due in 1 to 4 years	15,237,000		15,237,000		15,945,000
Fair Value, Total investments	36,906,000		36,906,000		37,007,000
Certificates of Deposit [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,590,000		3,590,000		844,000
Gross Unrecognized Gain	1,000		1,000		0
Gross Unrecognized (Loss)	(1,000)		(1,000)		0
Fair Value	3,590,000		3,590,000		844,000
Corporate Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	19,953,000		19,953,000		23,072,000
Gross Unrecognized Gain	172,000		172,000		131,000
Gross Unrecognized (Loss)	(2,000)		(2,000)		(31,000)
Fair Value	20,123,000		20,123,000		23,172,000
Municipal Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	13,175,000		13,175,000		12,921,000
Gross Unrecognized Gain	38,000		38,000		71,000
Gross Unrecognized (Loss)	(20,000)		(20,000)		(1,000)
Fair Value	13,193,000		13,193,000		12,991,000
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	996,000		996,000		1,245,000
Gross Unrealized Gain	6,000		6,000		2,000
Gross Unrealized (Loss)	0		0		0
Fair Value	1,002,000		1,002,000		1,247,000
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,033,000		6,033,000		6,047,000
Gross Unrealized Gain	71,000		71,000		38,000
Gross Unrealized (Loss)	0		0		0
Fair Value	6,104,000		6,104,000		6,085,000
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	531,000		531,000		961,000
Gross Unrealized Gain	1,000		1,000		1,000
Gross Unrealized (Loss)	0		0		0
Fair Value	$ 532,000		$ 532,000		$ 962,000