Stockholders' Equity and Stock-Based Compensation (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2012
Option Price per Share
Outstanding, minimum (usd per share)	$ 3.10	$ 34.20	$ 37.05	$ 42.45
Outstanding, maximum (usd per share)	245.85	245.85	245.85	$ 245.85
Granted, minimum (usd per share)	34.10	34.20	37.05
Granted, maximum (usd per share)	34.10	34.20	62.55
Exercised, minimum (usd per share)			45.00
Exercised, maximum (usd per share)			45.00
Cancelled/forfeited, minimum (usd per share)	3.10	37.05	45.00
Cancelled/forfeited, maximum (usd per share)	$ 245.85	$ 231.45	$ 231.45
Outstanding
Beginning balance (in shares)	560,797	599,069	550,567
Granted (in shares)	415,000	53,328	115,760
Exercised (in shares)	0	0	(1,900)
Cancelled/forfeited (in shares)	(128,162)	(91,600)	(65,358)
Ending balance (in shares)	847,635	560,797	599,069
Vested
Vested, beginning balance (in shares)	384,305	358,390	305,698
Vested (in shares)	67,480	79,779	92,750
Exercised (in shares)	0	0	(1,900)
Cancelled/forfeited (in shares)	(103,432)	(53,864)	(38,158)
Vested, ending balance (in shares)	348,353	384,305	358,390
Available for Grant
Beginning balance (in shares)	97,003	183,468	334,762
Increase in shares authorized (in shares)	1,150,940
Granted (in shares)	415,000	53,328	115,760
Plan Expiration (in shares)			(4,452)
Cancelled/forfeited (in shares)	18,895	12,358	14,453
Restricted stock granted out of option plans (in shares)	(259,300)	(45,652)	(48,503)
Restricted stock forfeited or cancelled for employee minimum income taxes and returned to the plans (in shares)	7,182	157	2,968
Ending balance (in shares)	599,720	97,003	183,468