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Shareholders' Equity (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	May. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Exercise price of warrants		$ 40		$ 40
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance		750,000		750,000
Awards available for issuance		173,942		173,942
Number of options exercised				119,381	64,800
Proceeds from exercise of options				$ 548,475	$ 304,788
Proceeds from exercise of warrants				548,475	$ 222,500	$ 478,299
Stock and option compensation		$ 483,000	$ 616,000
Proceeds from sale of common stock	$ 3,278,250
Shares issued	750,000
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued					24,000
Issuance of Stock and Warrants for Services or Claims				$ 10,007	$ 32,428	$ 369,844
Consultant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued				24,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options exercised				119,381	64,800	179,983
Shares issued					750,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common stock granted						282,900
Market value per share on the date of grant						$ 3.70
Stock and option compensation				$ 231,876	$ 526,574	$ 1,131,440
Unvested shares			62,667		62,667	611,692
Restricted Stock [Member] | Vesting Ratably [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						36 months
Restricted common stock granted						188,000
Restricted Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common stock granted						91,500
Restricted Stock [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common stock granted						3,400
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted				204,000	209,750	499,700
Options granted, weighted-average exercise price per share				$ 5.26	$ 5.19	$ 5.26
Number of options exercised					14,800	72,500
Proceeds from exercise of options				$ 0	$ 82,288	$ 322,475
Stock and option compensation				$ 483,133	$ 483,915	$ 1,431,620
Non-Employee Stock Options and Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted					24,000
Options granted, weighted-average exercise price per share					$ 6.58
Number of options exercised				137,174	50,000	25,000
Employee Stock Options and Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock and option compensation				$ 715,009	$ 1,010,489	$ 2,545,060
Minimum [Member] | Consultant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				24 months
Minimum [Member] | Non-Employee Stock Options and Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period				5 years
Maximum [Member] | Consultant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				59 months
Maximum [Member] | Non-Employee Stock Options and Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period				10 years

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