Stock-Based Compensation - Options Outstanding and exercisable (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		12 Months Ended
	Apr. 30, 2017	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock-based compensation
Stock based compensation expense related to shares issued for services			$ 53
Common Stock
Stock-based compensation
Stock based compensation expense related to shares issued for services			$ 1
Shares issued for services			30,002
2008 LTIP | Directors | Common Stock
Stock-based compensation
Stock based compensation expense related to shares issued for services	$ 53
Shares issued for services	30,002
2008 LTIP | Stock Options
Stock-based compensation
Number Outstanding			537,500	540,625	90,625
Weighted Average Remaining Contractual Life			6 years 11 months 23 days
Weighted Average Exercise Price			$ 2.19	$ 2.18	$ 4.95
Aggregate Intrinsic Value			$ 333,000
Number Outstanding (Exercisable)			177,500	90,625
Weighted Average Exercise Price (Exercisable)			$ 3.26	$ 4.95
Aggregate Intrinsic Value (Exercisable)			$ 67,000
Stock based compensation expense			$ 39	$ 32
Period for recognizing unrecognized compensation cost			3 years 1 month 24 days
2008 LTIP | Stock Options | January 21, 2009
Stock-based compensation
Number Outstanding			7,500
Weighted Average Remaining Contractual Life			1 year 18 days
Weighted Average Exercise Price			$ 4.00
Number Outstanding (Exercisable)			7,500
Weighted Average Exercise Price (Exercisable)			$ 4.00
2008 LTIP | Stock Options | March 18, 2009
Stock-based compensation
Number Outstanding			75,000
Weighted Average Remaining Contractual Life			1 year 2 months 16 days
Weighted Average Exercise Price			$ 4.98
Number Outstanding (Exercisable)			75,000
Weighted Average Exercise Price (Exercisable)			$ 4.98
2008 LTIP | Stock Options | January 21, 2010
Stock-based compensation
Number Outstanding			5,000
Weighted Average Remaining Contractual Life			2 years 18 days
Weighted Average Exercise Price			$ 6.00
Number Outstanding (Exercisable)			5,000
Weighted Average Exercise Price (Exercisable)			$ 6.00
2008 LTIP | Stock Options | February 24, 2016
Stock-based compensation
Number Outstanding			450,000
Weighted Average Remaining Contractual Life			8 years 1 month 24 days
Weighted Average Exercise Price			$ 1.62
Number Outstanding (Exercisable)			90,000
Weighted Average Exercise Price (Exercisable)			$ 1.62
2008 LTIP | Restricted stock | Chief Executive Officer
Stock-based compensation
Restricted stock award (in shares)		120,483
Stock based compensation expense			$ 105	$ 79
Unrecognized compensation cost			39
2008 LTIP | Restricted stock | Chief Executive Officer | Two-year period
Stock-based compensation
Restricted stock award (in shares)		100,000
Vesting period of stock award		2 years
2008 LTIP | Restricted stock | Chief Executive Officer | Three-year period
Stock-based compensation
Restricted stock award (in shares)		20,483
Vesting period of stock award		3 years
2008 LTIP | Restricted stock | Chief Executive Officer | Expected Recognition Period: 3 months
Stock-based compensation
Unrecognized compensation cost			$ 23
Period for recognizing unrecognized compensation cost			3 months
2008 LTIP | Restricted stock | Chief Executive Officer | Expected Recognition Period: 15 months
Stock-based compensation
Unrecognized compensation cost			$ 16
Period for recognizing unrecognized compensation cost			15 months
2008 LTIP | 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			$ 102