Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.8.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Apr. 11, 2017
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense     $ 1,044,167 $ 1,409,488 $ 1,037,679
Income tax benefit from share-based compensation     $ 0    
Valuation allowance on deferred tax assets     100.00%    
Options exercised     25,000   88,943
Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of options outstanding     1,814,231 1,690,037  
Percentage of Event Occurence to Vest     100.00%    
Stock options granted     483,260    
Stock option exercise price     $ 2.37    
Intrinsic value of options exercised     $ 97,872 $ 0 $ 99,895
Options exercised     25,000    
Weighted average fair value at grant date, Vested     $ 1.53 $ 2.00 $ 4.70
Unrecognized compensation cost     $ 1,233,528    
Weighted average vesting period, years     2 years 3 months 18 days    
Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of RSUs outstanding     47,300  
Number of shares granted     62,300    
Aggregate fair value     $ 114,632    
Unrecognized compensation cost     $ 67,496    
Weighted average vesting period, years     3 years 2 months 12 days    
The 2013 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options authorized for issuance     1,700,000    
Additional options authorized for issuance 1,700,000        
Shares available for issuance     1,874,719    
The 2013 Plan [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of options outstanding     1,477,231    
The 2013 Plan [Member] | Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of RSUs outstanding     47,300    
The 2003 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options authorized for issuance     0    
The 2003 Plan [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of options outstanding     325,000    
First Anniversary [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     30.00%    
Second Anniversary [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     30.00%    
Third Anniversary [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     40.00%    
First Anniversary (B) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     25.00%    
Second Anniversary (B) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     25.00%    
Third Anniversary (B) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     25.00%    
Fourth Anniversary (B) [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     25.00%    
Minimum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     1 year    
Expiration of options from grant date, years     5 years    
Maximum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     3 years    
Expiration of options from grant date, years     10 years    
Exercise Price Range $1.84 to $6.18 [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options granted     483,260    
Stock option grants fair value     $ 738,937    
Exercise Price Range $1.84 to $6.18 [Member] | Minimum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option exercise price     $ 1.84    
Exercise Price Range $1.84 to $6.18 [Member] | Maximum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option exercise price     $ 6.18    
Exercise Price Range $1.80 to $3.70 [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options granted       592,637  
Stock option grants fair value       $ 1,156,273  
Exercise Price Range $1.80 to $3.70 [Member] | Minimum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option exercise price       $ 1.80  
Exercise Price Range $1.80 to $3.70 [Member] | Maximum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option exercise price       $ 3.70  
Exercise Price Range $5.40 to $8.90 [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options granted         420,130
Stock option grants fair value         $ 1,994,893
Exercise Price Range $5.40 to $8.90 [Member] | Minimum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option exercise price         $ 5.40
Exercise Price Range $5.40 to $8.90 [Member] | Maximum [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option exercise price         $ 8.90
Third Party [Member] | The 2013 Plan [Member] | Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options granted   12,000