INVESTMENTS (Details) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 10,890,000	$ 7,554,000
Gross Unrealized Gain	33,000	70,000
Gross Unrealized (Loss)	(42,000)	0
Fair Value	10,881,000	7,624,000
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	36,712,000	32,730,000
Gross Unrecognized Gain	85,000	153,000
Gross Unrecognized (Loss)	(71,000)	(13,000)
Fair Value, Total investments	36,726,000	32,870,000
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	(5,000)	42,000
Redemptions of investments	623,000	1,300,000	16,300,000
Available-for-sale investments by stated maturity, amortized cost [Abstract]
Amortized Cost, Due in less than one year	6,509,000	1,027,000
Amortized Cost, Due in 1 to 4 years	4,381,000	6,527,000
Amortized Cost, Total investments	10,890,000	7,554,000
Available-for-sale investments by stated maturity, fair value [Abstract]
Fair Value, Due in less than one year	6,542,000	1,029,000
Fair Value, Due in 1 to 4 years	4,339,000	6,595,000
Fair Value, Total investments	10,881,000	7,624,000
Held-to-maturity investments by stated maturity, amortized cost [Abstract]
Amortized Cost, Due in less than one year	22,560,000	22,325,000
Amortized Cost, Due in 1 to 4 years	14,152,000	10,405,000
Amortized Cost, Total investments	36,712,000	32,730,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Due in less than one year	22,571,000	22,387,000
Fair Value, Due in 1 to 4 years	14,155,000	10,483,000
Fair Value, Total investments	36,726,000	32,870,000
Certificates of Deposit [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	5,722,000	3,341,000
Gross Unrecognized Gain	0	0
Gross Unrecognized (Loss)	(8,000)	0
Fair Value, Total investments	5,714,000	3,341,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	5,714,000	3,341,000
Commercial Paper [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	12,991,000
Gross Unrecognized Gain	0
Gross Unrecognized (Loss)	(1,000)
Fair Value, Total investments	12,990,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	12,990,000
Corporate Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	14,920,000	16,284,000
Gross Unrecognized Gain	65,000	121,000
Gross Unrecognized (Loss)	(33,000)	(3,000)
Fair Value, Total investments	14,952,000	16,402,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	14,952,000	16,402,000
Municipal Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,079,000	13,105,000
Gross Unrecognized Gain	20,000	32,000
Gross Unrecognized (Loss)	(29,000)	(10,000)
Fair Value, Total investments	3,070,000	13,127,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	3,070,000	13,127,000
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	498,000	996,000
Gross Unrealized Gain	1,000	5,000
Gross Unrealized (Loss)	0	0
Fair Value	499,000	1,001,000
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,392,000	6,029,000
Gross Unrealized Gain	32,000	65,000
Gross Unrealized (Loss)	(42,000)	0
Fair Value	10,382,000	6,094,000
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		529,000
Gross Unrealized Gain		0
Gross Unrealized (Loss)		0
Fair Value		$ 529,000