Stock Based Compensation - Options Outstanding (Details)	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Number of Shares Underlying Options, Beginning ( in shares) | shares	1,222,000
Outstanding Number of Shares Underlying Options, Granted (in shares) | shares	0
Outstanding Number of Shares Underlying Options, Exercised (in shares) | shares	0
Outstanding Number of Shares Underlying Options, Expired (in shares) | shares	(6,000)
Outstanding Number of Shares Underlying Options, Forfeited (in shares) | shares	(8,000)
Outstanding Number of Shares Underlying Options, Ending (in shares) | shares	1,208,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding Weighted Average Exercise Price, Beginning (in dollars per share) | $ / shares	$ 1.99
Outstanding Weighted Average Exercise Price, Granted (in dollars per share) | $ / shares	0.00
Outstanding Weighted Average Exercise Price, Exercised (in dollars per share) | $ / shares	0.00
Outstanding Weighted Average Exercise Price, Expired (in dollars per share) | $ / shares	1.93
Outstanding Weighted Average Exercise Price, Forfeited (in dollars per share) | $ / shares	2.39
Outstanding Weighted Average Exercise Price, Ending (in dollars per share) | $ / shares	$ 1.99
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable [Abstract]
Exercisable Number of Shares Underlying Options, Beginning (in shares) | shares	1,198,000
Exercisable Number of Shares Underlying Options, Ending (in shares) | shares	1,208,000
Exercisable Weighted Average Exercise Price, Beginning (in dollars per share) | $ / shares	$ 1.99
Exercisable Weighted Average Exercise Price, Ending (in dollars per share) | $ / shares	$ 1.99