Stock-Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock-Based Compensation [Abstract]
Share based compensation expense	$ 810,000	$ 914,000	$ 727,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Unrecognized compensation expense	1,500,000
Weighted average remaining service period	5 years 3 months 11 days
Cash received from exercise of stock options	44,000	272,000	133,000
Cash received from exercise of warrants			10,000
Aggregate intrinsic value of stock options exercised	57,000	94,000	103,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk free interest rate, minimum (in hundredths)	0.85%	0.34%	1.06%
Risk free interest rate, maximum (in hundredths)	1.68%	1.16%	2.28%
Dividend yield (in hundredths)	0.00%	0.00%	0.00%
Volatility rate, minimum (in hundredths)	51.31%	52.13%	49.49%
Volatility rate, maximum (in hundredths)	56.80%	57.85%	60.24%
Weighted average volatility (in hundredths)	52.46%	53.85%	55.04%
Employee Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life	5 years 5 months 26 days	2 years	3 years 9 months
Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life	7 years	6 years 3 months 11 days	6 years 11 months 23 days
Long Term Incentive Stock Option Plan 1995 [Member]
Share-based Payment Award [Line Items]
Term expiration for option to purchase shares, minimum	7 years
Term expiration for option to purchase shares, maximum	10 years
Plan Expiration	Jun. 30, 2018
Number of shares authorized (in shares)	5,500,000
Stock options remaining to be granted (in shares)	820,253
Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares under option and warrant, beginning balance (in shares)	3,070,803
Options granted (in shares)	293,000	212,870
Options exercised (in shares)	(162,000)
Options forfeited (in shares)	(165,816)
Shares under options and warrant, ending balance (in shares)	3,035,987	3,070,803
Options expected to vest (in shares)	1,287,801
Options and warrants exercisable, ending balance (in shares)	1,748,186
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, shares under option and warrant, beginning balance (in dollars per share)	$ 3.40
Weighted average exercise price, options granted (in dollars per share)	$ 1.76
Weighted average exercise price, options exercised (in dollars per share)	$ 1.62
Weighted average exercise price, options forfeited (in dollars per share)	$ 2.71
Weighted average exercise price, shares under options and warrant, ending balance (in dollars per share)	$ 3.38	$ 3.40
Weighted average exercise price, options expected to vest (in dollars per share)	$ 2.37
Weighted average exercise price, options and warrants exercisable, beginning balance (in dollars per share)	$ 4.12
Share-based Payment Award, Options, Additional Disclosures [Abstract]
Aggregate intrinsic value, shares under option and warrant, beginning of period	0
Aggregate intrinsic value, options expected to vest	0
Aggregate intrinsic value, options and warrants exercisable, ending balance	$ 0
Weighted average remaining contractual life, shares under option and warrant, beginning of period	4 years 3 months 25 days
Weighted average remaining contractual life, options expected to vest	5 years 3 months 11 days
Weighted average remaining contractual life, options and warrants exercisable, end of period	3 years 7 months 13 days
Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Options granted (in shares)	293,000	212,870
Long Term Incentive Stock Option Plan 1995 [Member] | Installments One [Member]
Share-based Payment Award [Line Items]
Number of Installments	3
Long Term Incentive Stock Option Plan 1995 [Member] | Installments Two [Member]
Share-based Payment Award [Line Items]
Number of Installments	5
Long Term Incentive Stock Option Plan 1995 [Member] | Installments Three [Member]
Share-based Payment Award [Line Items]
Number of Installments	7
Long Term Incentive Stock Option Plan 1995 [Member] | Non-vested Share Activity [Member]
Share-based Payment Award, Options, Outstanding [Roll Forward]
Options granted (in shares)	293,000
Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested options, beginning balance (in shares)	1,750,107
Options granted (in shares)	293,000
Options forfeited	(120,646)
Options vested during the period	(634,660)
Nonvested options, ending balance (in shares)	1,287,801
Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average fair value at beginning of period (in dollars per share)	$ 1.43
Weighted average fair value, options granted (in dollars per share)	$ 0.90
Weighted average fair value, options forfeited (in dollars per share)	$ 1.19
Weighted average fair value, options vested during the period (in dollars per share)	$ 1.45
Weighted average fair value at end of period (in dollars per share)	$ 1.33