Accounting for Stock-Based Compensation (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounting for Stock-Based Compensation
Stock options granted (in shares)	0	13,000
Stock-based compensation expense	$ 42,000	$ 68,000
Options exercised (in shares)	136,000	150,000
Valuation Assumptions
Weighted average grant date fair value (in dollars per share)		$ 2.44
Expected dividend yield (as a percent)		0.00%
Risk-free interest rate (as a percent)		1.50%
Expected volatility (as a percent)		188.00%
Expected life (in years)		5 years
Forfeiture rate (as a percent)		4.00%