Stockholders' Equity (Narrative) (Details)			1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 10, 2014 shares	Jun. 05, 2013 shares	May. 31, 2014 USD ($)	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2015 USD ($) $ / shares item shares	Dec. 31, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Votes per share | item					1
Dividends declared				$ 0	$ 0
Dividends paid					$ 0
Aggregate gross sales price			$ 18,000,000
Commission percentage of gross proceeds			3.00%
Aggregate shares of common stock sold | shares				71,754
Average price per share | $ / shares				$ 1.97	$ 1.97
Gross proceeds from common stock sold				$ 141,497
Net proceeds from common stock sold				137,253
Remaining common stock available				$ 14,100,000	$ 14,100,000
2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in number of shares authorized for issuance under the Plan | shares	1,000,000	1,000,000
Remaining shares of Company's common stock to provide for current and future grants under its various equity plans | shares				699,995	699,995
Total compensation cost related to options, stock appreciation rights and non-vested stock granted to employees not yet recognized				$ 2,300,000	$ 2,300,000
Estimated forfeitures					$ 1,200,000
Amortization period of total compensation cost related to options, stock appreciation rights and non-vested stock granted to employees not yet recognized					4 years
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares outstanding | shares				805,754	805,754	697,751
Restricted Stock [Member] | 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares outstanding | shares				0	0