Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.7.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 03, 2015
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2013
Equity Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized for issuance under equity incentive plan           62,500
Increased number of shares authorized for issuance under equity incentive plan 225,000          
Warrants [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Period over which compensation expense will be recognized   4 years 1 month 6 days   4 years 3 months 18 days    
Warrants outstanding   170,314     362,500  
Exercise price of warrants   $ 32.44     $ 8.34  
Outstanding intrinsic value   $ 0        
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense   $ 74,000        
Period over which compensation expense will be recognized   8 months 12 days        
Outstanding   2,778   2,778    
Restricted stock expense   $ 28,000 $ 28,000      
Employee Stock Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted   240,000        
Compensation expense   $ 455,000        
Unrecognized compensation expense   $ 907,000        
Period over which compensation expense will be recognized   1 year 9 months 18 days        
Aggregate fair value of stock options   $ 1,260,000        
Non-cash compensation expense   $ 448,000 $ 30,000      
Exercise price of options granted   $ 10.72        
Option term   10 years        
Option vesting period   3 years        
Options vested   80,000