Stockholders' Equity and Employee Stock Option Plans Exercise Price ranges and related information for options and SARS (Tables)

12 Months Ended

Dec. 31, 2013

Exercise Price ranges and related information for options and SARS [Abstract]

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

The following table provides additional information for significant ranges of outstanding and exercisable stock options and SARs as of December 31, 2013:

Exercise Price Range	Number Outstanding	Weighted Average Remaining Contractual Life (in years)	Weighted Average Exercise Price per Share		Aggregate Intrinsic Value
2.11-2.29	419,600	9.68	$	2.19	$	4,640
2.37	1,183,829	9.44	2.37		—
2.51-2.57	92,500	9.30	2.55		—
3.17	1,217,567	8.37	3.17		—
3.40-7.46	513,725	4.23	6.02		—
7.47-8.20	431,978	0.47	7.55		—
9.08-10.62	123,900	2.36	9.99		—
12.11	40,000	0.69	12.11		—
12.82	75,000	0.86	12.82		—
13.85	6,750	0.78	13.85		—
Outstanding	4,104,849	7.08	$	4.13	$	4,640
Vested and expected to vest	3,918,854	7.06	$	4.20	$	4,212
Exercisable	1,348,270	3.64	$	6.60	$	—