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Stock-based Compensation (Details) - 2008 LTIP - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2017
Mar. 31, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Stock-based compensation            
Shares authorized to be granted under stock compensation plan     2,000,000   2,000,000  
Shares available for future awards under stock compensation plan     1,308,890   1,308,890  
Directors | Common Stock            
Stock-based compensation            
Stock based compensation expense $ 52,000          
Shares            
Granted (in shares) 30,002          
Stock Options            
Shares            
Outstanding at beginning of the period (in shares)         540,625 90,625
Granted (in shares)           450,000
Outstanding at end of the period (in shares)     540,625 540,625 540,625 540,625
Exercisable at end of the period (in shares)     180,625 90,625 180,625 90,625
Weighted Average Exercise Price            
Outstanding at beginning of period (in dollars per share)         $ 2.18 $ 4.95
Granted price (in dollars per share)           1.62
Outstanding at end of period (in dollars per share)     $ 2.18 $ 2.18 2.18 2.18
Exercisable at end of period (in dollars per share)     $ 3.29 $ 4.95 $ 3.29 $ 4.95
Additional disclosures            
Weighted Average Remaining Contractual Term, Outstanding (in years)         7 years 6 months 8 years 6 months
Weighted Average Remaining Contractual Term, Exercisable (in years)         5 years 2 months 9 days 2 years 9 months
Aggregate Intrinsic Value     $ 225,000 $ 86,000 $ 225,000 $ 86,000
Aggregate Intrinsic Value (Exercisable)     45,000   45,000  
Stock Options | Senior Executive Officers            
Stock-based compensation            
Vesting period of stock award           5 years
Contractual term of option awards           10 years
Fair value of stock options           $ 194,000
Stock option per shares (in dollars per share)           $ 0.43
Volatility           27.36%
Risk free interest rate           1.21%
Expected option term           5 years
Dividend yield           0.00%
Stock based compensation expense     10,000 10,000 $ 19,000 $ 13,000
Shares            
Granted (in shares)         0 450,000
Weighted Average Exercise Price            
Exercised price (in dollars per share)           $ 1.62
Additional disclosures            
Unrecognized compensation cost     142,000   $ 142,000  
Period for recognizing unrecognized compensation cost         3 years 7 months 24 days  
Restricted stock | Chief Executive Officer            
Stock-based compensation            
Restricted stock award (in shares)   120,483        
Stock based compensation expense     27,000 $ 26,000 $ 53,000 $ 26,000
Additional disclosures            
Unrecognized compensation cost     92,000   92,000  
Restricted stock | Chief Executive Officer | Expected Recognition Period: 9 months            
Additional disclosures            
Unrecognized compensation cost     79,000   $ 79,000  
Period for recognizing unrecognized compensation cost         9 months  
Restricted stock | Chief Executive Officer | Expected Recognition Period: 12 months            
Additional disclosures            
Unrecognized compensation cost     13,000   $ 13,000  
Period for recognizing unrecognized compensation cost         12 months  
Cash-settled restricted stock units | Chief Executive Officer            
Stock-based compensation            
Restricted stock award (in shares) 129,270          
Vesting period of stock award 2 years          
Stock based compensation expense     $ 23,000      
Two-year period | Restricted stock | Chief Executive Officer            
Stock-based compensation            
Restricted stock award (in shares)   100,000        
Vesting period of stock award   2 years        
Three-year period | Restricted stock | Chief Executive Officer            
Stock-based compensation            
Restricted stock award (in shares)   20,483        
Vesting period of stock award   3 years