Income Taxes - NOL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
NOL and tax credit carry-forward
Period of time Section 382 limitation will likely increase	3 years
Deferred Tax Assets, Operating Loss Carryforwards	$ 4,851	$ 7,682
Alternative minimum tax credit	846	$ 2,491
Federal.
NOL and tax credit carry-forward
NOL available for carry-forward	9,500
Deferred tax assets, operating loss carryforwards, domestic	2,800
Alternative minimum tax credit	500
State tax
NOL and tax credit carry-forward
NOL available for carry-forward	14,000
Deferred tax assets, operating loss carryforwards, State	1,500
Alternative minimum tax credit	300
State tax | Prior Years
NOL and tax credit carry-forward
Deferred tax assets, operating loss carryforwards, State	300
MISN | Federal.
NOL and tax credit carry-forward
Deferred tax assets, operating loss carryforwards, domestic	3,000
MISN | State tax
NOL and tax credit carry-forward
Deferred tax assets, operating loss carryforwards, State	$ 1,000