Stockholders' Equity (Equity Compensation Plan) (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2009	Dec. 31, 2015	Apr. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock options			266,810		113,672
Granted			190,151
Stock-based compensation expense		$ 689,130	$ 582,630
Stock option expense		$ 488,613	$ 530,361
Weighted average grant-date fair value		$ 5.33	$ 12.84
Unrecognized stock-based compensation expense		$ 2,200,000
Unrecognized stock-based compensation expense, recognition period		16 years 8 months 12 days
2009 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Incentive Plan, shares authorized				21,739		65,217
Expiration term				10 years
Outstanding stock options		24,042	24,977
Common shares available for issuance						86,957
2014 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Incentive Plan, shares authorized	50,000
Stock Incentive Plan, shares authorized increased					60,000
Expiration term	10 years
Outstanding stock options		232,768	88,699
Granted	1,100,000
2009 and 2014 Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted			300,000
2017 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Incentive Plan, shares authorized		500,000
Outstanding stock options		10,000
Common shares available for issuance		553,196