Consolidated Statement of Shareholders' Equity (USD $)	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid in Capital Warrants [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Comprehensive Income [Member]	Total
Shareholders' equity beginning balance at Mar. 31, 2009	$ 120,000	$ 0	$ 92,459,000	$ 1,879,000	$ (1,984,000)	$ 609,000		$ 93,083,000
Shares outstanding at beginning of period (in shares) at Mar. 31, 2009	11,962,021	0
Compensation recognized under employee stock plans	0	0	136,000	0	0	0		136,000
Exercise of options (in shares)	64,000
Exercise of options	0	0	152,000	0	0	0		152,000
Tax Benefit from Stock Options Exercised	0	0	69,000	0	0	0		69,000
Impact of tax benefit on APIC pool	0	0	(24,000)	0	0	0		(24,000)
Unrealized gain on investments, net of tax	0	0	0	0	80,000	0	80,000	80,000
Foreign currency translation	0	0	0	0	478,000	0	478,000	478,000
Net income	0	0	0	0	0	9,646,000	9,646,000	9,646,000
Comprehensive Income							10,204,000
Shareholders' equity ending balance at Mar. 31, 2010	120,000	0	92,792,000	1,879,000	(1,426,000)	10,255,000		103,620,000
Shares outstanding at end of period (in shares) at Mar. 31, 2010	12,026,021	0
Compensation recognized under employee stock plans	0	0	59,000	0	0	0		59,000
Exercise of options (in shares)	52,250
Exercise of options	1,000	0	199,000	0	0	0		200,000
Tax Benefit from Stock Options Exercised	0	0	123,000	0	0	0		123,000
Impact of tax benefit on APIC pool	0	0	(33,000)	0	0	0		(33,000)
Repurchase of common stock including fees (in shares)		(14,400)
Repurchase of common stock including fees	0	(89,000)	0	0	0	0		(89,000)
Unrealized gain on investments, net of tax	0	0	0	0	(3,000)	0	(3,000)	(3,000)
Foreign currency translation	0	0	0	0	1,080,000	0	1,080,000	1,080,000
Net income	0	0	0	0	0	12,220,000	12,220,000	12,220,000
Comprehensive Income							13,297,000
Shareholders' equity ending balance at Mar. 31, 2011	121,000	(89,000)	93,140,000	1,879,000	(349,000)	22,475,000		117,177,000
Shares outstanding at end of period (in shares) at Mar. 31, 2011	12,078,271	(14,400)
Compensation recognized under employee stock plans	0	0	52,000	0	0	0		52,000
Exercise of options (in shares)	95,550
Exercise of options	1,000	0	320,000	0	0	0		321,000
Tax Benefit from Stock Options Exercised	0	0	255,000	0	0	0		255,000
Impact of tax benefit on APIC pool	0	0	(83,000)	0	0	0		(83,000)
Common stock issued as consideration for acquisition	3,000	0	4,943,000	0	0	0		4,946,000
Common stock issued as consideration for acquisition (in shares)	360,000
Unrealized gain on investments, net of tax	0	0	0	0	70,000	0	70,000	70,000
Foreign currency translation	0	0	0	0	(605,000)	0	(605,000)	(605,000)
Net income	0	0	0	0	0	(48,514,000)	(48,514,000)	(48,514,000)
Comprehensive Income							(49,049,000)
Shareholders' equity ending balance at Mar. 31, 2012	$ 125,000	$ (89,000)	$ 98,627,000	$ 1,879,000	$ (884,000)	$ (26,039,000)		$ 73,619,000
Shares outstanding at end of period (in shares) at Mar. 31, 2012	12,533,821	(14,400)