Stock-Based Compensation (Details Textual) (USD $)	1 Months Ended		3 Months Ended		12 Months Ended	1 Months Ended			3 Months Ended
	Mar. 31, 2013	Jul. 31, 2010	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Feb. 28, 2013 Employee Stock Purchase Plan ("ESPP") [Member]	Feb. 29, 2012 Employee Stock Purchase Plan ("ESPP") [Member]	May 31, 1998 Employee Stock Purchase Plan ("ESPP") [Member]	Mar. 31, 2013 Employee Stock Purchase Plan ("ESPP") [Member]	Mar. 31, 2013 Restricted Stock [Member]	Mar. 31, 2012 Restricted Stock [Member]	Mar. 31, 2013 Stock Plans [Member]	Mar. 31, 2012 Stock Plans [Member]	Mar. 31, 2013 Service Based Restricted Stock Units [Member]	Mar. 31, 2012 Service Based Restricted Stock Units [Member]	Mar. 31, 2013 Performance Units [Member]	Mar. 31, 2012 Performance Units [Member]	Mar. 31, 2013 Restricted Stock Units [Member]	Mar. 31, 2012 Restricted Stock Units [Member]	Mar. 31, 2013 Employee Withholding Taxes on Stock Awards [Member]	Mar. 31, 2012 Employee Withholding Taxes on Stock Awards [Member]
Stock Based Compensation (Additional Textual) [Abstract]
Compensation expense for share-based payments			$ 624,000	$ 698,000
Share-based expense			0	39,000						600,000	600,000	59,000,000	100,000
Grants vesting period										4 years				4 years
Restricted stock awards issued										0	229,950				5,000
Restricted stock awards cancellation										2,500	5,988			1,125		147,250	1,320	1,125
Grant date fair value of restricted stock cancelled										17,000,000	39			8		1,000,000	9,000
Grant date fair value of restricted stock issued											1,600,000
Performance share units converted to restricted stock awards										139,150							139,150
Grant date fair value of options granted										900,000							1,200,000
Grant date fair value of restricted stock vested										2,000,000	2,600,000			25,000	16,000		33,000
Restricted shares vested grant date intrinsic value										2,500,000	3,400,000			28,000	20,000		36,000
Shares, other than options, vested										339,553				339,553	452,230		4,836	3,850	2,600
Unrecognized compensation expense	35		35							2,400,000		72,000				0
Weighted average period			1 year 7 months 6 days							1 year 4 months 24 days		1 year 4 months 24 days
Employee stock options vesting provisions, description												25% vest one year from the date of grant and thereafter in monthly increments over the remaining three years
Percent of options vested												25.00%
Options vested in remaining period												3 years
Options granted			1,500									1,500	4,500				169,650
Period of termination of employment												90 days
Weighted average exercise price granted												$ 2.97	$ 2.77
Proceeds from options exercised												73,000	25,000
Option exercised			10,194									10,194	3,719
Intrinsic value												4,000	3,000
Shares expired			72,537									91,537	119,548
Percentage of fair market value to determine purchase price								85.00%
Proceeds of from issuance of shares under ESPP						300,000	300,000
Offering period					6 months
Period of expected life, options granted									5 years
Fair value of options issued															35,000
Lower range of exercise prices			$ 5.50
Upper range of exercise prices			$ 11.84
Repurchase of shares			0
Repurchase of shares, Amount	5,000,000
Options Cancelled			19,000
Weighted Average Exercise Price Granted			$ 7.71
Plan exercisable Period			2 years 5 months 23 days
Options issued						61,230	48,032
Payment of withholding taxes related to stock awards																				$ 900,000	$ 1,200,000
Stock Based Compensation (Textual) [Abstract]
Stock options granted period		7 years	10 years
Intrinsic value based on share price	$ 7.10		$ 7.10
Rate of discount on fair market value of common stock under ESPP			15.00%