Annual report pursuant to Section 13 and 15(d)

Stock options and warrants (Other common stock purchase options and warrants) (Narrative) (Details)

v2.4.0.8
Stock options and warrants (Other common stock purchase options and warrants) (Narrative) (Details) (USD $)
1 Months Ended 12 Months Ended
May 30, 2013
Nov. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation, operating expense         $ 1,437,865 $ 901,161 $ 1,336,177
Stock issued during period 14,400,000 3,600,000 12,200,000 1,456,000 12,969,587 15,146,400 1,456,065
Warrants, number of shares 4,025,000   305,000 267,500     267,500
Warrants, number of shares per warrant 0.35     1     1
Warrants, exercise price 1.36   2.50 7.32     7.32
Nonqualified [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Awards outstanding         4,622,505 598,507  
Share-based compensation, operating expense         22,000 71,000 92,000
Options granted         4,025,000    
Options granted, exercise price         $ 1.36    
Fair value of options vested         24,000 89,000 61,000
Unrecognized compensation expense         $ 0    
Nonqualified [Member] | Public Offering [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options expired             22,892
Options expired, exercise price             $ 144.60
Nonqualified [Member] | Non-compensatory Rights [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Awards outstanding         4,597,505 572,505  
Nonqualified [Member] | Compensatory Arrangements [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Awards outstanding         25,000 26,002  
Nonqualified [Member] | Senior Vice President [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options granted           20,000  
Options granted, exercise price           $ 3.42  
Vesting period           1 year  
Percent of shares vesting on the six month anniversary from grant date           50.00%  
Percent of shares vesting in equal increments over six months after the six month anniversary from grant date           50.00%  
Expiration period           10 years  
Nonqualified [Member] | Vice President, Marketing and Business [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options granted             6,667
Options granted, exercise price             $ 19.50
Vesting period             3 years
Nonqualified [Member] | Investor Relations Firm [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options granted             5,000
Options granted, exercise price             $ 30.00
Vesting period             12 months
Expiration period             3 years
Options expired           2,004 4,584
Nonqualified [Member] | Investor Relations Firm [Member] | Excercise Price Range One [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options expired             1,500
Options expired, exercise price             $ 360.00
Nonqualified [Member] | Investor Relations Firm [Member] | Excercise Price Range Two [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options expired             1,251
Options expired, exercise price             $ 180.30
Nonqualified [Member] | Investor Relations Firm [Member] | Exercise Price Range Three [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options expired             1,667
Options expired, exercise price             $ 167.10
Nonqualified [Member] | Investor Relations Firm [Member] | Exercise Price Range Four [Member]
             
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options expired             166
Options expired, exercise price             $ 149.70