Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Options	Weighted Average Exercise Price	Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2011	301,634	$18.57
Granted	536,895	$2.90
Cancelled	(41,175)	$3.06
Expired	(11,368)	$78.97
Outstanding at December 31, 2012	785,986	$7.81	8.48	─
Cancelled	(34,966)	$3.06
Expired	(36,308)	$25.01
Outstanding at December 31, 2013	714,712	$7.17	7.58	─
Exercisable at December 31, 2013	477,478	$9.29	7.28	─

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2012
Expected volatility	84.0%
Risk-free interest rate	1.1%
Dividend yield	─
Expected life in years	5.9
Weighted average grant date fair value	$2.04

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Shares	Weighted Average Grant Date Fair Value	Aggregate Intrinsic Value
Non-vested share units at December 31, 2011	25,238	$5.64	─
Granted	172,147	$2.91	─
Vested and issued	(12,508)	$5.50	─
Forfeited	(17,712)	$3.35	─
Non-vested share units at December 31, 2012	167,165	$3.08	─
Granted	254,411	$2.17	─
Vested and issued	(74,978)	$3.22	─
Forfeited	(34,402)	$2.48	─
Non-vested share units at December 31, 2013	312,196	$2.37	─
Vested and unissued at December 31, 2013	26,638	$2.55	─