Accounting for Stock-Based Compensation (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accounting for Stock-Based Compensation
Stock-based compensation expense	$ 70,000	$ 68,000
Options exercised (in shares)	0	30,000
Valuation Assumptions
Weighted average grant date fair value (in dollars per share)	$ 0.47	$ 0.64
Weighted average assumptions used:
Expected dividend yield (as a percent)	0.00%	0.00%
Risk-free interest rate (as a percent)	0.80%	0.80%
Expected volatility (as a percent)	225.00%	213.00%
Expected life	4 years 10 months 24 days	4 years 10 months 24 days
Employees
Accounting for Stock-Based Compensation
Stock options granted (in shares)	263,000	310,000