Income Taxes - Deferred Tax Asset (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Deferred tax assets
Net operating loss carryforward	$ 2,837	$ 2,287
Net capital loss carryforward	1,092	1,123
GAAP/Tax basis differences	3,446	3,059
Total deferred tax assets	7,375	6,469
Deferred tax liabilities
Deferred tax liabilities	215	303
Valuation allowance	(6,912)	(5,978)
Total net deferred tax asset	$ 248	$ 188