Stock-Based Compensation; Changes in Equity (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares Outstanding at the end of period (in shares)	148,000
Shares, Exercisable (in shares)	88,000
Weighted Average Exercise Price, Outstanding at the end of period (in dollars per share)	$ 5.22
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 5.2
Weighted Average Remaining Contractual Life, Outstanding (in years)	2 years 6 months
Weighted Average Remaining Contractual Life, Exercisable (in years)	1 year 9 months 18 days
Aggregate Intrinsic Value Outstanding (in dollars)	$ 223,170
Aggregate Intrinsic Value, Exercisable (in dollars)	$ 134,578
Employee Stock Option [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares Outstanding, beginning of period (in shares)	154,000
Shares, Granted (in shares)	0
Shares, Cancelled/Expired (in shares)	(6,000)
Shares, Exercised (in shares)	0
Shares Outstanding at the end of period (in shares)	148,000	154,000
Shares, Exercisable (in shares)	88,000
Weighted Average Exercise Price, Outstanding, beginning of period (in dollars per share)	$ 5.25
Weighted Average Exercise Price, Cancelled/Expired (in dollars per share)	5.96
Weighted Average Exercise Price, Outstanding at the end of period (in dollars per share)	5.22	$ 5.25
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 5.2
Weighted Average Remaining Contractual Life, Outstanding (in years)	2 years 6 months	2 years 10 months 24 days
Weighted Average Remaining Contractual Life, Exercisable (in years)	1 year 9 months 18 days
Aggregate Intrinsic Value Outstanding (in dollars)	$ 223,170	$ 1,450
Aggregate Intrinsic Value, Exercisable (in dollars)	$ 134,578