Accounting for Stock-Based Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accounting for Stock-Based Compensation
Options exercised (in shares)	0	0	150,000	157,500
Valuation Assumptions
Weighted average grant date fair value (in dollars per share)			$ 2.09	$ 1.79
Weighted average assumptions used:
Expected dividend yield (as a percent)			0.00%	0.00%
Risk-free interest rate (as a percent)			1.37%	1.46%
Expected volatility (as a percent)			176.00%	228.00%
Expected life (in years)			5 years	4 years 10 months 24 days
Employees
Accounting for Stock-Based Compensation
Stock-based compensation expense	$ 49,000	$ 97,000	$ 161,000	$ 284,000
Employees and directors
Accounting for Stock-Based Compensation
Stock options granted (in shares)			40,000	295,000