Summary of Significant Accounting Policies - EPS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net loss per common share - basic and diluted:
Net loss	$ (184,000)	$ (239,000)
Net loss available to common stockholders	$ (184,000)	$ (239,000)
Weighted-average shares outstanding - basic and diluted	32,319,000	32,199,000
Net loss per common share - basic and diluted	$ (0.01)	$ (0.01)
Options outstanding (in shares)	0	0
Dividends paid	$ 0	$ 0
Accounting for stock-based compensation
Stock-based compensation expense for restricted stock awards	128,000	103,000
Income tax expense related to vesting of restricted stock awards	$ 20,000	$ 77,000