Stock-Based Compensation; Changes in Equity (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares Outstanding at the end of period (in shares)	143,094
Shares, Exercisable (in shares)	113,238
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)	$ 5.21
Weighted Average Remaining Contractual Life, Outstanding (in years)	1 year 6 months
Weighted Average Remaining Contractual Life, Exercisable (in years)	1 year
Aggregate Intrinsic Value Outstanding (in dollars)	$ 65,518
Aggregate Intrinsic Value, Exercisable (in dollars)	$ 53,748
Employee Stock Option [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares Outstanding, beginning of period (in shares)	143,094
Shares, Granted (in shares)	0
Shares, Cancelled (in shares)	0
Shares, Exercised (in shares)	0
Shares Outstanding at the end of period (in shares)	143,094	143,094
Shares, Exercisable (in shares)	113,238
Weighted Average Exercise Price, Outstanding, beginning of period (in dollars per share)	$ 5.22
Weighted Average Exercise Price, Granted (in dollars per share)	0
Weighted Average Exercise Price, Cancelled (in dollars per share)	0
Weighted Average Exercise Price, Exercised (in dollars per share)	0
Weighted Average Exercise Price, Outstanding at the end of period (in dollars per share)	5.22	$ 5.22
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 5.21
Weighted Average Remaining Contractual Life, Outstanding (in years)	1 year 6 months	2 years 10 months 24 days
Weighted Average Remaining Contractual Life, Exercisable (in years)	1 year
Aggregate Intrinsic Value Outstanding (in dollars)	$ 65,518	$ 89,494
Aggregate Intrinsic Value, Exercisable (in dollars)	$ 53,748