Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Common Stock Unit Activity (Details)

v3.7.0.1
Stock-Based Compensation - Common Stock Unit Activity (Details) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]    
Nonvested, Balance (in shares) 23,984 53,324
Vested (in shares) (23,984) (25,342)
Forfeited (in shares) 0 (3,998)
Nonvested, Balance (in shares) 0 23,984
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Nonvested weighted average grant-date fair value (in dollars per share) $ 1.37 $ 1.37
Vested (in dollars per share) 1.37 1.37
Forfeited (in dollars per share) 0 1.37
Nonvested weighted average grant-date fair value (in dollars per share) $ 0 $ 1.37