INVESTMENTS (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 10,366,000		$ 10,366,000		$ 10,890,000
Gross Unrealized Gain	7,000		7,000		33,000
Gross Unrealized (Loss)	(36,000)		(36,000)		(42,000)
Fair Value	10,337,000		10,337,000		10,881,000
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	31,358,000		31,358,000		36,712,000
Gross Unrecognized Gain	49,000		49,000		85,000
Gross Unrecognized (Loss)	(95,000)		(95,000)		(71,000)
Fair Value, Total investments	31,312,000		31,312,000		36,726,000
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	(18,000)		(18,000)		(5,000)
Redemptions of investments	0	0	1,300,000	623,000
Available-for-sale investments by stated maturity, amortized cost [Abstract]
Amortized Cost, Due in less than one year	6,003,000		6,003,000		6,509,000
Amortized Cost, Due in 1 to 4 years	4,363,000		4,363,000		4,381,000
Amortized Cost, Total investments	10,366,000		10,366,000		10,890,000
Available-for-sale investments by stated maturity, fair value [Abstract]
Fair Value, Due in less than one year	6,010,000		6,010,000		6,542,000
Fair Value, Due in 1 to 4 years	4,327,000		4,327,000		4,339,000
Fair Value, Total Investments	10,337,000		10,337,000		10,881,000
Held-to-maturity investments by stated maturity, amortized cost [Abstract]
Amortized Cost, Due in less than one year	14,834,000		14,834,000		22,560,000
Amortized Cost, Due in 1 to 4 years	16,524,000		16,524,000		14,152,000
Amortized Cost, Total investments	31,358,000		31,358,000		36,712,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Due in less than one year	14,821,000		14,821,000		22,571,000
Fair Value, Due in 1 to 4 years	16,491,000		16,491,000		14,155,000
Fair Value, Total investments	31,312,000		31,312,000		36,726,000
Certificates of Deposit [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	4,477,000		4,477,000		5,722,000
Gross Unrecognized Gain	0		0		0
Gross Unrecognized (Loss)	(6,000)		(6,000)		(8,000)
Fair Value, Total investments	4,471,000		4,471,000		5,714,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	4,471,000		4,471,000		5,714,000
Commercial Paper [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,995,000		3,995,000		12,991,000
Gross Unrecognized Gain	1,000		1,000		0
Gross Unrecognized (Loss)	(1,000)		(1,000)		(1,000)
Fair Value, Total investments	3,995,000		3,995,000		12,990,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	3,995,000		3,995,000		12,990,000
Corporate Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	19,855,000		19,855,000		14,920,000
Gross Unrecognized Gain	31,000		31,000		65,000
Gross Unrecognized (Loss)	(85,000)		(85,000)		(33,000)
Fair Value, Total investments	19,801,000		19,801,000		14,952,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	19,801,000		19,801,000		14,952,000
Municipal Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,031,000		3,031,000		3,079,000
Gross Unrecognized Gain	17,000		17,000		20,000
Gross Unrecognized (Loss)	(3,000)		(3,000)		(29,000)
Fair Value, Total investments	3,045,000		3,045,000		3,070,000
Held-to-maturity investments by stated maturity, fair value [Abstract]
Fair Value, Total investments	3,045,000		3,045,000		3,070,000
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost					498,000
Gross Unrealized Gain					1,000
Gross Unrealized (Loss)					0
Fair Value					499,000
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,366,000		10,366,000		10,392,000
Gross Unrealized Gain	7,000		7,000		32,000
Gross Unrealized (Loss)	(36,000)		(36,000)		(42,000)
Fair Value	$ 10,337,000		$ 10,337,000		$ 10,382,000