Stock-Based Compensation (Details Textual) (USD $)	1 Months Ended	12 Months Ended				12 Months Ended								1 Months Ended	12 Months Ended				12 Months Ended
	Dec. 11, 2012	Dec. 31, 2012	Dec. 31, 2011	Jun. 19, 2012	Dec. 31, 2010	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Stock Incentive Plan [Member]	Dec. 31, 2012 Stock Incentive Plan [Member] Maximum [Member]	Dec. 31, 2012 Stock Incentive Plan [Member] Minimum [Member]	Dec. 31, 2012 2008 Equity Incentive Plan [Member]	Dec. 31, 2011 2008 Equity Incentive Plan [Member]	Dec. 31, 2010 2008 Equity Incentive Plan [Member]	Jun. 30, 2012 2006 Management Incentive Plan [Member]	Dec. 31, 2012 2006 Management Incentive Plan [Member]	Dec. 31, 2011 2006 Management Incentive Plan [Member]	Dec. 31, 2010 2006 Management Incentive Plan [Member]	Aug. 11, 2006 2006 Management Incentive Plan [Member]	Dec. 31, 2012 The Plans [Member]	Dec. 31, 2011 The Plans [Member]	Dec. 31, 2010 The Plans [Member]	Dec. 31, 2012 Employee [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2012 Director [Member]	Dec. 31, 2010 Director [Member]	Dec. 31, 2012 Director [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2012 Employee inducement [Member]	Dec. 31, 2011 Employee inducement [Member]	Dec. 31, 2011 Employee inducement [Member] Maximum [Member]	Dec. 31, 2011 Employee inducement [Member] Minimum [Member]	Dec. 31, 2012 Restricted Stock and Restricted Stock Units [Member]	Dec. 31, 2012 Restricted Stock and Restricted Stock Units [Member] Employee [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2012 Restricted Stock and Restricted Stock Units [Member] Director [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2010 Restricted Stock and Restricted Stock Units [Member] Director [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2012 Restricted Stock and Restricted Stock Units [Member] Employee inducement [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2011 Restricted Stock and Restricted Stock Units [Member] Employee inducement [Member] 2008 Equity Incentive Plan [Member]	Dec. 31, 2011 Restricted Stock and Restricted Stock Units [Member] Employee inducement [Member] 2008 Equity Incentive Plan [Member] Maximum [Member]	Dec. 31, 2011 Restricted Stock and Restricted Stock Units [Member] Employee inducement [Member] 2008 Equity Incentive Plan [Member] Minimum [Member]	Dec. 31, 2012 Stock Options [Member] 2008 Equity Incentive Plan [Member]
Stock-Based Compensation (Textual) [Abstract]
Number of shares reserved for issuance under the 2008 EIP		2,000,000				5,400,000	3,400,000
Number of shares available for future grants under EIP		2,984,160	2,860,890								2,125,164
Total number of shares reserved for issuance											7,600,000
Stock options award vesting right																														vest in equal annual increments over the vesting period								vest in equal annual increments over the vesting period
Stock options vesting period									7 years	5 years	3 years			3 years								3 years	3 years	3 years	1 year	3 years		4 years	3 years		3 years	3 years	3 years	3 years		4 years	3 years
Vesting period																																						7 years
Weighted-average grant date fair value of options granted per share											$ 4.13	$ 3.94	$ 2.69
Weighted-average grant date fair value of nonvested stock awards vested											$ 4,900,000	$ 3,600,000	$ 1,500,000
Percentage of performance units															60.00%
Percentage of fair market value															40.00%
Performance units to additional executive		(685,740)
Additional performance units to executive		536,093	0																													8,546	8,546	45,000	120,000
Grant date fair value awards														1,200,000
Performance units to executive																44,831	224,158
Stock Incentive plan exercisable								ratable basis over one to five years
Cash payment			100,000														600,000
Additional shares issued																26,898	134,490
Public Offering By Company	2,500,000
Total of performance units were outstanding and fully vested				154,264
Performance based options											100,000
Authorization issue of shares								1,237,500										2,100,000
Unrecognized Stock-based compensation expense related to stock options																			8,700,000
Selling, general and administrative expenses																			6,300,000	5,100,000	4,000,000
Compensation expense															200,000	100,000	100,000
Common stock, shares authorized		50,000,000	50,000,000
Weighted-average period for recognizing stock compensation expense																			1 year 7 months 6 days
Stock Based Compensation (Additional Textual) [Abstract]
Total of performance units were outstanding and fully vested				154,264
Number of shares increased as per amendment		2,200,000
No. of Options Granted		707,057																					8,546	8,546		45,000	200,000
Aggregate intrinsic value		$ 3,147,000	$ 400,000		$ 100,000
Weighted average grant date fair value		$ 6.54	$ 5.37		$ 4.05